{"id":1833,"date":"2026-09-07T09:49:31","date_gmt":"2026-09-07T01:49:31","guid":{"rendered":"https:\/\/www.batteriestar.com\/blog\/?p=1833"},"modified":"2026-09-07T09:49:33","modified_gmt":"2026-09-07T01:49:33","slug":"seiko-v17-v172-v174-v175-v176-review-and-battery-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.batteriestar.com\/blog\/2026\/09\/07\/seiko-v17-v172-v174-v175-v176-review-and-battery-replacement-guide\/","title":{"rendered":"Seiko V17 \/ V172 \/ V174 \/ V175 \/ V176 Review and Battery Replacement Guide"},"content":{"rendered":"\n<p>If you are looking for a Seiko solar chronograph that combines quartz accuracy, long battery life, and relatively low maintenance, the <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V17<\/strong><\/a> family is worth a closer look.<\/p>\n\n\n\n<p>One important point should be clarified first: <strong>Seiko V17, V172, V174, V175, and V176 are not five completely unrelated movements.<\/strong> V172, V174, V175, and V176 are specific calibers within Seiko&#8217;s solar chronograph family.<\/p>\n\n\n\n<p>For owners of a <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V17<\/strong><\/a> watch, the most important long-term maintenance issue is usually not the quartz movement itself, but the rechargeable energy-storage cell.<\/p>\n\n\n\n<p>This is why a suitable <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a> can make a major difference when an older watch starts showing short operating time or repeated low-power warnings.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Seiko V17: The Short Verdict<\/h2>\n\n\n\n<p>The biggest strength of the <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V17<\/strong><\/a> platform is not complicated mechanical construction. It is the combination of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Solar charging<\/li>\n\n\n\n<li>Quartz timekeeping<\/li>\n\n\n\n<li>Chronograph functionality<\/li>\n\n\n\n<li>Long power reserve<\/li>\n\n\n\n<li>Rechargeable energy storage<\/li>\n\n\n\n<li>Relatively low routine maintenance<\/li>\n<\/ul>\n\n\n\n<p>The basic operating principle is simple:<\/p>\n\n\n\n<p><strong>Light \u2192 solar cell \u2192 electrical energy \u2192 rechargeable storage cell \u2192 quartz movement<\/strong><\/p>\n\n\n\n<p>According to Seiko&#8217;s documentation, these solar chronographs can run for approximately six months when fully charged and subsequently kept away from light.<\/p>\n\n\n\n<p>That makes the <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V17<\/strong><\/a> family particularly attractive for everyday wear, outdoor use, and owners who do not want to replace conventional disposable watch batteries every few years.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">V172 vs V174 vs V175 vs V176<\/h1>\n\n\n\n<p>The four calibers share the same basic solar-quartz philosophy, but their functions are different.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Caliber<\/th><th>Main Functions<\/th><th>Stopwatch Resolution<\/th><th>Additional Functions<\/th><\/tr><tr><td>V172<\/td><td>Solar Chronograph<\/td><td>1\/5 second<\/td><td>Alarm<\/td><\/tr><tr><td>V174<\/td><td>Solar Chronograph<\/td><td>1\/5 second<\/td><td>Alarm + 24-hour hand<\/td><\/tr><tr><td>V175<\/td><td>Solar Chronograph<\/td><td>1\/5 second<\/td><td>24-hour hand \/ Solar Diver applications<\/td><\/tr><tr><td>V176<\/td><td>Solar Chronograph<\/td><td>1\/20 second<\/td><td>More basic chronograph layout<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>This distinction is important when buying a replacement part. Searching only for &#8220;Seiko solar battery&#8221; is not enough.<\/p>\n\n\n\n<p>The correct <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a> should be matched against the actual caliber, original cell, terminal configuration, and movement design.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Seiko V172 Review<\/h1>\n\n\n\n<p>The V172 is one of the more feature-rich versions of the family.<\/p>\n\n\n\n<p>It provides normal timekeeping and chronograph functionality while also incorporating an alarm.<\/p>\n\n\n\n<p>Typical functions include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Time display<\/li>\n\n\n\n<li>Date<\/li>\n\n\n\n<li>Stopwatch<\/li>\n\n\n\n<li>Alarm<\/li>\n\n\n\n<li>Solar charging<\/li>\n<\/ul>\n\n\n\n<p>The alarm can be adjusted to a specified time, making the V172 more versatile than a basic solar chronograph.<\/p>\n\n\n\n<p>From a practical perspective, the <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V172<\/strong><\/a> is particularly attractive if you want a sports watch that combines traditional chronograph styling with an alarm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V172 Advantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Solar powered<\/li>\n\n\n\n<li>Quartz accuracy<\/li>\n\n\n\n<li>1\/5-second chronograph<\/li>\n\n\n\n<li>Alarm function<\/li>\n\n\n\n<li>Good long-term practicality<\/li>\n\n\n\n<li>Rechargeable energy-storage system<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">V172 Disadvantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Some models are relatively thick<\/li>\n\n\n\n<li>More functions mean more things to check on an older second-hand watch<\/li>\n\n\n\n<li>An aging rechargeable cell can cause symptoms that are sometimes mistaken for a movement failure<\/li>\n<\/ul>\n\n\n\n<p>For an older <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V172<\/strong><\/a>, checking the condition of the rechargeable cell should therefore be part of any serious inspection.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Seiko V174 Review<\/h1>\n\n\n\n<p>The V174 builds on the same general concept while adding a 24-hour indication.<\/p>\n\n\n\n<p>The 24-hour hand is useful for distinguishing AM from PM and also contributes to the more complicated appearance of the dial.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V174<\/strong><\/a> is therefore a good choice for people who prefer a technical-looking chronograph dial with multiple indications.<\/p>\n\n\n\n<p>The downside is that the more complicated dial layout can make the watch less immediately readable than a simpler three-hand watch.<\/p>\n\n\n\n<p>For collectors, however, that complexity is part of the appeal.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Seiko V175 Review: The Most Interesting Model for Divers<\/h1>\n\n\n\n<p>Among these calibers, the V175 deserves special attention.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V175<\/strong><\/a> is associated with Seiko&#8217;s Solar Diver applications and can be found in sports-oriented models designed around a more rugged use case.<\/p>\n\n\n\n<p>That changes the maintenance priorities.<\/p>\n\n\n\n<p>With a normal chronograph, replacing the energy-storage cell and checking the watch&#8217;s basic functions may be enough for ordinary ownership.<\/p>\n\n\n\n<p>With a V175 used as a diving watch, battery replacement should also involve:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Inspection of the case gasket<\/li>\n\n\n\n<li>Cleaning of the sealing surface<\/li>\n\n\n\n<li>Correct gasket lubrication<\/li>\n\n\n\n<li>Correct case-back installation<\/li>\n\n\n\n<li>Water-resistance testing<\/li>\n<\/ul>\n\n\n\n<p>A watch that runs perfectly is not necessarily a watch that is safe to take underwater.<\/p>\n\n\n\n<p>For an older <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V175<\/strong><\/a>, pressure testing is therefore strongly recommended after case opening.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Seiko V176 Review<\/h1>\n\n\n\n<p>The V176 takes a more straightforward approach.<\/p>\n\n\n\n<p>Instead of concentrating on additional functions such as an alarm, the <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V176<\/strong><\/a> focuses on solar-powered quartz timekeeping and chronograph operation.<\/p>\n\n\n\n<p>One interesting specification is its 1\/20-second stopwatch indication.<\/p>\n\n\n\n<p>For owners who prefer fewer functions and a relatively straightforward design, the V176 is arguably one of the most attractive calibers in the group.<\/p>\n\n\n\n<p>In practical ownership, fewer auxiliary functions can also mean fewer things to troubleshoot.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">How the Seiko Solar System Works<\/h1>\n\n\n\n<p>The core technology behind the <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V17<\/strong><\/a> family is the solar charging system.<\/p>\n\n\n\n<p>The solar cell is positioned beneath the dial.<\/p>\n\n\n\n<p>When light reaches the dial, the solar cell converts light energy into electrical energy.<\/p>\n\n\n\n<p>The energy is then stored in a rechargeable cell.<\/p>\n\n\n\n<p>The process can be summarized as:<\/p>\n\n\n\n<p><strong>Light<\/strong><\/p>\n\n\n\n<p>\u2193<\/p>\n\n\n\n<p><strong>Solar cell<\/strong><\/p>\n\n\n\n<p>\u2193<\/p>\n\n\n\n<p><strong>Electrical energy<\/strong><\/p>\n\n\n\n<p>\u2193<\/p>\n\n\n\n<p><strong>Rechargeable storage cell<\/strong><\/p>\n\n\n\n<p>\u2193<\/p>\n\n\n\n<p><strong>Quartz movement<\/strong><\/p>\n\n\n\n<p>The watch does not require direct sunlight to operate.<\/p>\n\n\n\n<p>Indoor lighting can also provide energy, although stronger and more direct illumination generally provides more effective charging.<\/p>\n\n\n\n<p>This is one reason why an older <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V17<\/strong><\/a> should not immediately be considered defective simply because it stops after being left in a drawer.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">How Long Does a Fully Charged Seiko V17 Run?<\/h1>\n\n\n\n<p>Seiko specifies approximately six months of operation from a full charge under the relevant conditions.<\/p>\n\n\n\n<p>However, owners of older watches should not assume that a ten- or fifteen-year-old watch will necessarily achieve the same real-world performance as a new one.<\/p>\n\n\n\n<p>The effective operating time can be influenced by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rechargeable cell aging<\/li>\n\n\n\n<li>Charging history<\/li>\n\n\n\n<li>Temperature<\/li>\n\n\n\n<li>Chronograph usage<\/li>\n\n\n\n<li>Alarm usage<\/li>\n\n\n\n<li>Electrical consumption<\/li>\n\n\n\n<li>Overall movement condition<\/li>\n<\/ul>\n\n\n\n<p>This is where a <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a> becomes relevant.<\/p>\n\n\n\n<p>Solar does not mean that the storage cell lasts forever.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">How to Tell If the Rechargeable Battery Is Aging<\/h1>\n\n\n\n<p>One of the most useful diagnostic clues is the behavior of the seconds hand.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Normal One-Second Operation<\/h2>\n\n\n\n<p>A seconds hand moving once per second generally indicates normal operation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Two-Second Jumping<\/h2>\n\n\n\n<p>If the seconds hand starts moving in two-second increments, this is an important low-power warning.<\/p>\n\n\n\n<p>Do not immediately assume that the battery has failed.<\/p>\n\n\n\n<p>The first step should be to expose the watch to an appropriate light source and recharge it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Still Two-Second Jumping After Extended Charging<\/h2>\n\n\n\n<p>If the watch receives substantial light exposure but continues to indicate low power, possible causes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Aging rechargeable cell<\/li>\n\n\n\n<li>Insufficient charging<\/li>\n\n\n\n<li>Solar-cell problems<\/li>\n\n\n\n<li>Poor electrical contact<\/li>\n\n\n\n<li>Excessive movement consumption<\/li>\n\n\n\n<li>Electronic circuit problems<\/li>\n<\/ul>\n\n\n\n<p>At this point, installing a correctly specified <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a> may be appropriate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Short Runtime After Full Charging<\/h2>\n\n\n\n<p>If the watch appears to charge normally but loses power unusually quickly after being removed from light, an aging storage cell becomes a strong possibility.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">What Battery Does the Seiko V17 Series Use?<\/h1>\n\n\n\n<p>This is where replacement work requires caution.<\/p>\n\n\n\n<p>The V172, V174, V175, and V176 family uses a <strong>rechargeable energy-storage cell<\/strong>, rather than a conventional disposable watch battery.<\/p>\n\n\n\n<p>Replacement parts encountered in the service market can include designations such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>TS920E<\/li>\n\n\n\n<li>MT920<\/li>\n\n\n\n<li>3023-24H<\/li>\n\n\n\n<li>3023-24T<\/li>\n\n\n\n<li>3023-34T<\/li>\n<\/ul>\n\n\n\n<p>However, these designations should not be treated as interchangeable simply because they look similar.<\/p>\n\n\n\n<p>When ordering a <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a>, verify:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Caliber number<\/li>\n\n\n\n<li>Original battery designation<\/li>\n\n\n\n<li>Battery dimensions<\/li>\n\n\n\n<li>Terminal configuration<\/li>\n\n\n\n<li>Contact arrangement<\/li>\n\n\n\n<li>Manufacturer specification<\/li>\n<\/ol>\n\n\n\n<p>The product reference above is particularly useful as a starting point for identifying the relevant Seiko battery part, but the original component should always be checked before installation.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Do Not Install a Normal CR2032<\/h1>\n\n\n\n<p>This is one of the most important warnings in this entire guide.<\/p>\n\n\n\n<p>Do <strong>not<\/strong> assume that a conventional coin cell can replace the rechargeable cell simply because the physical dimensions appear similar.<\/p>\n\n\n\n<p>Avoid treating these as generic substitutes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CR2032<\/li>\n\n\n\n<li>CR2025<\/li>\n\n\n\n<li>Standard disposable SR-series cells<\/li>\n\n\n\n<li>Other non-rechargeable coin cells<\/li>\n<\/ul>\n\n\n\n<p>A solar watch is designed around a rechargeable energy-storage system.<\/p>\n\n\n\n<p>Installing an inappropriate disposable battery can create a serious electrical and charging problem.<\/p>\n\n\n\n<p>For this reason, use a correctly specified <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a> designed for the movement and its charging system.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">TS920E vs MT920: Why the Names Can Be Confusing<\/h1>\n\n\n\n<p>The aftermarket battery market can be confusing because suppliers sometimes list related part numbers together.<\/p>\n\n\n\n<p>You may encounter:<\/p>\n\n\n\n<p><strong>TS920E \/ MT920 \/ 3023-series<\/strong><\/p>\n\n\n\n<p>in different product listings.<\/p>\n\n\n\n<p>That does not automatically mean that every product carrying one of these names is a drop-in replacement for every V17-family movement.<\/p>\n\n\n\n<p>The safest approach is to remove the original cell, record its exact markings and terminal arrangement, and compare the replacement physically and electrically.<\/p>\n\n\n\n<p>A <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a> with the correct terminal arrangement is generally preferable to buying a generic cell solely because the nominal size appears correct.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Seiko V17 Battery Replacement Difficulty<\/h1>\n\n\n\n<p>I would rate the replacement procedure approximately:<\/p>\n\n\n\n<p><strong>\u2605\u2605\u2605\u2605\u2606 \u2014 Intermediate to advanced<\/strong><\/p>\n\n\n\n<p>The cell itself is small and conceptually simple to replace.<\/p>\n\n\n\n<p>The difficulty comes from working inside a compact watch movement.<\/p>\n\n\n\n<p>Potentially delicate components include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Solar circuitry<\/li>\n\n\n\n<li>Coil<\/li>\n\n\n\n<li>Electronic components<\/li>\n\n\n\n<li>Battery contacts<\/li>\n\n\n\n<li>Movement components<\/li>\n\n\n\n<li>Chronograph mechanism<\/li>\n<\/ul>\n\n\n\n<p>A slipped screwdriver or careless metal tool can cause more damage than the original battery problem.<\/p>\n\n\n\n<p>For that reason, first-time hobbyists should consider having the work performed by an experienced watch technician.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Tools Required for Battery Replacement<\/h1>\n\n\n\n<p>A professional or well-equipped repair bench may include:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Case Opening<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Case-back opener<\/li>\n\n\n\n<li>Correct die or wrench<\/li>\n\n\n\n<li>Non-slip work mat<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Movement Work<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Non-magnetic precision tweezers<\/li>\n\n\n\n<li>1.0\u20131.2 mm precision screwdrivers<\/li>\n\n\n\n<li>Plastic pry tool<\/li>\n\n\n\n<li>Magnification loupe or microscope<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Sealing Maintenance<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Replacement gasket<\/li>\n\n\n\n<li>Appropriate silicone grease<\/li>\n\n\n\n<li>Case-back cleaning tools<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Water-Resistance Testing<\/h3>\n\n\n\n<p>For diving models such as the V175:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pressure tester<\/li>\n\n\n\n<li>Vacuum tester where appropriate<\/li>\n\n\n\n<li>Professional water-resistance verification equipment<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Step-by-Step Seiko V17 Battery Replacement<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Step 1: Confirm the Caliber<\/h2>\n\n\n\n<p>Before opening the watch, identify the caliber printed on the case back.<\/p>\n\n\n\n<p>For example:<\/p>\n\n\n\n<p><strong>V172-xxxx<\/strong><\/p>\n\n\n\n<p>The important movement designation is <strong>V172<\/strong>.<\/p>\n\n\n\n<p>The remaining characters generally identify the specific watch\/case configuration.<\/p>\n\n\n\n<p>Seiko&#8217;s documentation also directs owners to identify the caliber code from the case back when locating the appropriate operating instructions.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Step 2: Open the Case Back<\/h2>\n\n\n\n<p>The exact procedure depends on the case design.<\/p>\n\n\n\n<p>Some watches use screw-down backs while others use press-fit backs.<\/p>\n\n\n\n<p>Do not use a screwdriver to force open a screw-down case back.<\/p>\n\n\n\n<p>Likewise, a press-fit case back should normally be opened using the appropriate case-back notch and tool.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Step 3: Inspect the Gasket<\/h2>\n\n\n\n<p>Do not immediately remove the battery.<\/p>\n\n\n\n<p>First inspect the case gasket.<\/p>\n\n\n\n<p>Look for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hardening<\/li>\n\n\n\n<li>Cracks<\/li>\n\n\n\n<li>Flattening<\/li>\n\n\n\n<li>Loss of elasticity<\/li>\n\n\n\n<li>Deformation<\/li>\n<\/ul>\n\n\n\n<p>On an older watch, replacing the gasket at the same time is often sensible.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Step 4: Locate the Rechargeable Cell<\/h2>\n\n\n\n<p>Once the case is open, identify the storage cell and its retaining structure.<\/p>\n\n\n\n<p>The battery may be held by a metal retaining component or contact assembly.<\/p>\n\n\n\n<p>Take a clear photograph before removing anything.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Step 5: Release the Battery Retainer<\/h2>\n\n\n\n<p>Use a suitable non-magnetic precision tool.<\/p>\n\n\n\n<p>Work slowly and avoid touching unrelated electronic components.<\/p>\n\n\n\n<p>The objective is to release the retaining structure without bending or damaging the contact.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Step 6: Remove the Old Cell<\/h2>\n\n\n\n<p>Before discarding the old battery, record:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Exact model number<\/li>\n\n\n\n<li>Polarity<\/li>\n\n\n\n<li>Terminal direction<\/li>\n\n\n\n<li>Contact position<\/li>\n\n\n\n<li>Retaining method<\/li>\n<\/ul>\n\n\n\n<p>This information can be extremely useful when comparing a replacement.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Step 7: Install the Correct Replacement<\/h2>\n\n\n\n<p>When installing a <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a>, compare the new part directly with the old one.<\/p>\n\n\n\n<p>Pay particular attention to the terminals.<\/p>\n\n\n\n<p>Do not force the battery into position.<\/p>\n\n\n\n<p>Do not unnecessarily bend the terminal tabs.<\/p>\n\n\n\n<p>A replacement cell supplied with the correct terminal configuration is generally easier and safer to install.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Do Not Treat the Battery Like a Normal Electronic Component<\/h1>\n\n\n\n<p>One common mistake is applying ordinary soldering practices to a tiny rechargeable watch cell.<\/p>\n\n\n\n<p>If the original battery uses a specialized contact or terminal assembly, it is preferable to use the correct battery configuration rather than applying prolonged heat directly to the cell.<\/p>\n\n\n\n<p>Rechargeable cells are sensitive to excessive heat.<\/p>\n\n\n\n<p>If you do not have suitable equipment and experience, purchasing the correctly configured <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a> and having a watch technician install it is the safer approach.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">What to Do After Battery Replacement<\/h1>\n\n\n\n<p>Do not immediately conclude that the new cell is defective.<\/p>\n\n\n\n<p>A replacement storage cell may not be fully charged.<\/p>\n\n\n\n<p>After installation:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Expose the watch to a suitable strong light source.<\/li>\n\n\n\n<li>Allow sufficient charging time.<\/li>\n\n\n\n<li>Check whether the seconds hand returns to normal one-second operation.<\/li>\n\n\n\n<li>Test the chronograph.<\/li>\n\n\n\n<li>Test the date mechanism.<\/li>\n\n\n\n<li>Test the alarm on V172\/V174 models.<\/li>\n\n\n\n<li>Check the 24-hour indication where applicable.<\/li>\n\n\n\n<li>Verify that the stopwatch hands return correctly to their reference positions.<\/li>\n<\/ol>\n\n\n\n<p>A correctly installed <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a> should be evaluated only after the watch has had an opportunity to recharge.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">What If the Watch Still Does Not Run?<\/h1>\n\n\n\n<p>Do not immediately blame the replacement battery.<\/p>\n\n\n\n<p>Follow a logical diagnostic sequence.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Check the Light<\/h3>\n\n\n\n<p>Make sure the watch has actually received enough illumination.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Check Battery Orientation<\/h3>\n\n\n\n<p>Verify the polarity and installation position.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Check the Contacts<\/h3>\n\n\n\n<p>A battery that looks correctly installed may still have poor electrical contact.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Check the Solar Cell<\/h3>\n\n\n\n<p>If the solar charging system is defective, replacing the storage cell alone will not solve the problem.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Check the Electronic Circuit<\/h3>\n\n\n\n<p>The movement may require an IC reset after servicing.<\/p>\n\n\n\n<p>Seiko documentation includes a procedure for resetting the built-in IC.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Stopwatch Hands Not Returning to Zero?<\/h1>\n\n\n\n<p>This is another common situation after maintenance.<\/p>\n\n\n\n<p>Suppose the chronograph is stopped, but the central stopwatch hand does not return exactly to 12 o&#8217;clock.<\/p>\n\n\n\n<p>That does not necessarily mean that the movement has failed.<\/p>\n\n\n\n<p>Seiko provides procedures for adjusting the preliminary position of the stopwatch hands.<\/p>\n\n\n\n<p>After battery service, the chronograph reference position may therefore need to be checked and adjusted.<\/p>\n\n\n\n<p>For the <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V17<\/strong><\/a> family, the exact adjustment procedure depends on the caliber.<\/p>\n\n\n\n<p>V172, V174, and V175 use their respective 1\/5-second chronograph configuration, while the V176 has its own 1\/20-second stopwatch hand arrangement.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Special Warning for Seiko V175 Owners<\/h1>\n\n\n\n<p>For a V175 used in a diving watch, battery replacement is only one part of the service.<\/p>\n\n\n\n<p>The correct process should ideally be:<\/p>\n\n\n\n<p><strong>Battery replacement<\/strong><\/p>\n\n\n\n<p>\u2193<\/p>\n\n\n\n<p><strong>Gasket inspection\/replacement<\/strong><\/p>\n\n\n\n<p>\u2193<\/p>\n\n\n\n<p><strong>Case and sealing-surface cleaning<\/strong><\/p>\n\n\n\n<p>\u2193<\/p>\n\n\n\n<p><strong>Correct lubrication<\/strong><\/p>\n\n\n\n<p>\u2193<\/p>\n\n\n\n<p><strong>Case-back installation<\/strong><\/p>\n\n\n\n<p>\u2193<\/p>\n\n\n\n<p><strong>Pressure\/water-resistance test<\/strong><\/p>\n\n\n\n<p>Only after successful water-resistance verification should the watch be considered ready for serious underwater use.<\/p>\n\n\n\n<p>Do not assume that an older watch retains its original factory water resistance simply because the model was originally marketed as a diver.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Advantages of the Seiko V17 Family<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1. Solar Power<\/h2>\n\n\n\n<p>The biggest advantage is reduced dependence on conventional disposable batteries.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Quartz Accuracy<\/h2>\n\n\n\n<p>The quartz architecture provides practical accuracy without the servicing requirements of a mechanical chronograph.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. Mature Chronograph System<\/h2>\n\n\n\n<p>The V172, V174, and V175 provide 1\/5-second stopwatch functionality, while the V176 provides a 1\/20-second configuration.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. Long Power Reserve<\/h2>\n\n\n\n<p>A fully charged system can provide approximately six months of operation without additional light under the specified conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5. Serviceable Energy Storage<\/h2>\n\n\n\n<p>The rechargeable storage cell is a replaceable service component.<\/p>\n\n\n\n<p>A suitable <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a> can therefore extend the useful life of an older watch rather than forcing the owner to replace the entire timepiece.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">6. Good Documentation<\/h2>\n\n\n\n<p>Seiko has published operating documentation covering the V172, V174, V175, and V176 calibers, which is useful when servicing and troubleshooting these watches.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Disadvantages<\/h1>\n\n\n\n<p>No movement is perfect.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Rechargeable cells eventually age<\/h3>\n\n\n\n<p>Solar power does not mean unlimited battery life.<\/p>\n\n\n\n<p>The storage cell undergoes charging and discharging over many years and can eventually lose capacity.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Professional tools may be necessary<\/h3>\n\n\n\n<p>Opening the case and working around a compact quartz movement requires suitable tools and experience.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Complicated dials are not for everyone<\/h3>\n\n\n\n<p>V172, V174, and V175 watches can have very busy dial layouts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Chronograph operation consumes additional energy<\/h3>\n\n\n\n<p>Although the effect is not necessarily dramatic, there is little reason to leave the chronograph running continuously when it is not needed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Water resistance deteriorates with age<\/h3>\n\n\n\n<p>Older gaskets and seals should never automatically be treated as equivalent to those of a new watch.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Is a Used Seiko V17 Worth Buying?<\/h1>\n\n\n\n<p>In my view, yes \u2014 provided the buyer evaluates the movement and energy-storage system rather than focusing only on cosmetic condition.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V172<\/h3>\n\n\n\n<p>A strong choice if you want:<\/p>\n\n\n\n<p><strong>Solar + Chronograph + Alarm<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V174<\/h3>\n\n\n\n<p>Interesting for collectors who like:<\/p>\n\n\n\n<p><strong>Chronograph + Alarm + 24-hour indication<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V175<\/h3>\n\n\n\n<p>Arguably the most interesting model for sports-watch enthusiasts because of its association with Solar Diver applications.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V176<\/h3>\n\n\n\n<p>A particularly good option for practical users who prefer a simpler chronograph configuration.<\/p>\n\n\n\n<p>The common factor is that an older <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V17<\/strong><\/a> can remain highly usable if its rechargeable cell and sealing system are properly maintained.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Second-Hand Buying Checklist<\/h1>\n\n\n\n<p>When buying a used V172, V174, V175, or V176, do not start by checking scratches on the case.<\/p>\n\n\n\n<p>Check the power system first.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Test Charging<\/h3>\n\n\n\n<p>Expose the watch to a suitable strong light source.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Watch the Seconds Hand<\/h3>\n\n\n\n<p>Normal operation:<\/p>\n\n\n\n<p><strong>One-second jumps<\/strong><\/p>\n\n\n\n<p>Low-power indication:<\/p>\n\n\n\n<p><strong>Two-second jumps<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Test the Chronograph<\/h3>\n\n\n\n<p>Check:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Start<\/li>\n\n\n\n<li>Stop<\/li>\n\n\n\n<li>Reset<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. Check Zero Position<\/h3>\n\n\n\n<p>The stopwatch hands should return correctly to their reference positions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Test the Alarm<\/h3>\n\n\n\n<p>For V172 and V174 models, check:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Setting<\/li>\n\n\n\n<li>Activation<\/li>\n\n\n\n<li>Sound<\/li>\n\n\n\n<li>Cancellation<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">6. Check the Date<\/h3>\n\n\n\n<p>Verify that the date mechanism operates correctly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7. Check Water Resistance on V175<\/h3>\n\n\n\n<p>If the seller claims the watch is suitable for diving, ask for evidence of a recent pressure test.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Seiko V17 Family Rating<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Category<\/th><th>V172<\/th><th>V174<\/th><th>V175<\/th><th>V176<\/th><\/tr><tr><td>Timekeeping<\/td><td>9.5\/10<\/td><td>9.5\/10<\/td><td>9.5\/10<\/td><td>9.5\/10<\/td><\/tr><tr><td>Power System<\/td><td>9\/10<\/td><td>9\/10<\/td><td>9\/10<\/td><td>9\/10<\/td><\/tr><tr><td>Chronograph<\/td><td>9\/10<\/td><td>9\/10<\/td><td>9\/10<\/td><td>9.5\/10<\/td><\/tr><tr><td>Features<\/td><td>9.5\/10<\/td><td>9.5\/10<\/td><td>8.5\/10<\/td><td>8\/10<\/td><\/tr><tr><td>Reliability<\/td><td>9\/10<\/td><td>9\/10<\/td><td>9\/10<\/td><td>9\/10<\/td><\/tr><tr><td>Service Difficulty<\/td><td>7\/10<\/td><td>7\/10<\/td><td>6\/10<\/td><td>8\/10<\/td><\/tr><tr><td>Used-Market Appeal<\/td><td>9\/10<\/td><td>8.5\/10<\/td><td>9.5\/10<\/td><td>8.5\/10<\/td><\/tr><tr><td>Overall<\/td><td><strong>9.0\/10<\/strong><\/td><td><strong>9.0\/10<\/strong><\/td><td><strong>9.2\/10<\/strong><\/td><td><strong>8.8\/10<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Final Verdict<\/h1>\n\n\n\n<p>The <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko V17<\/strong><\/a> family is a mature and practical solar-quartz chronograph platform.<\/p>\n\n\n\n<p>Its real value is not mechanical complexity. It is the combination of:<\/p>\n\n\n\n<p><strong>Solar charging + quartz accuracy + chronograph functionality + long operating time + rechargeable energy storage.<\/strong><\/p>\n\n\n\n<p>The four calibers have clear personalities:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>V172:<\/strong> the feature-rich option with an alarm<\/li>\n\n\n\n<li><strong>V174:<\/strong> alarm plus 24-hour indication<\/li>\n\n\n\n<li><strong>V175:<\/strong> the Solar Diver-oriented choice and one of the most interesting versions for collectors<\/li>\n\n\n\n<li><strong>V176:<\/strong> the simpler, practical chronograph with 1\/20-second indication<\/li>\n<\/ul>\n\n\n\n<p>For owners of an older watch, the most important maintenance lesson is simple:<\/p>\n\n\n\n<p><strong>A solar watch still has an aging rechargeable energy-storage cell.<\/strong><\/p>\n\n\n\n<p>When charging performance has deteriorated, the right <a href=\"https:\/\/www.batteriestar.com\/detail\/Seiko\/3023.24H\/1741978\"><strong>Seiko replacement battery<\/strong><\/a> can be an important part of restoring practical battery life.<\/p>\n\n\n\n<p>However, do not purchase a replacement cell based solely on the words &#8220;MT920&#8221; or &#8220;Seiko solar battery.&#8221; Confirm the exact caliber, original battery specification, dimensions, and terminal configuration first.<\/p>\n\n\n\n<p>For anyone buying a used V172, V174, V175, or V176, I would therefore prioritize the following:<\/p>\n\n\n\n<p><strong>Movement condition \u2192 charging performance \u2192 rechargeable cell \u2192 chronograph operation \u2192 gasket condition \u2192 water resistance \u2192 cosmetic condition.<\/strong><\/p>\n\n\n\n<p>That approach is much more useful than judging an older Seiko solar chronograph by appearance alone.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Does the Seiko V17 use a normal watch battery?<\/h3>\n\n\n\n<p>No. The V17-family solar chronographs use a rechargeable energy-storage system rather than a conventional disposable coin cell.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How long can a fully charged V17 run?<\/h3>\n\n\n\n<p>Seiko specifies approximately six months of operation without additional light when fully charged, although actual performance depends on the condition of the watch and rechargeable cell.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can I use a CR2032 instead?<\/h3>\n\n\n\n<p>No. A conventional disposable CR2032 should not be treated as a substitute for the movement&#8217;s specified rechargeable storage cell.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What should I buy for a V172, V174, V175, or V176?<\/h3>\n\n\n\n<p>Start by identifying the exact caliber and the original cell. Common market designations include TS920E, MT920, and several 3023-series references, but physical and electrical compatibility must be confirmed before purchase.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is battery replacement difficult?<\/h3>\n\n\n\n<p>It is an intermediate-to-advanced watch repair because the battery is located inside a compact movement and the surrounding electronic components and contacts can be damaged by careless tools.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Does V175 require special servicing?<\/h3>\n\n\n\n<p>Yes. If the watch is intended for diving, battery replacement should ideally be followed by gasket inspection and professional water-resistance testing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why is my stopwatch hand not returning to zero?<\/h3>\n\n\n\n<p>The movement may require adjustment of the preliminary position of the stopwatch hands. This does not automatically mean that the movement or replacement battery is defective.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is the Seiko V17 worth buying used?<\/h3>\n\n\n\n<p>Yes, especially if the watch charges properly, the chronograph functions correctly, the hands reset accurately, and the case seals are in good condition. An aging rechargeable cell should be treated as a normal service consideration rather than an automatic reason to reject the watch.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you are looking for a Seiko solar chronograph that combines quartz accuracy, long battery life, and relatively low maintenance, the Seiko V17 family is worth a closer look. One important point should be clarified first: Seiko V17, V172, V174, V175, and V176 are not five completely unrelated movements. V172, V174, V175, and V176 are [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[534],"tags":[535],"class_list":["post-1833","post","type-post","status-publish","format-standard","hentry","category-button-cell-battery","tag-seiko-v17-v172-v174-v175-v176"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Seiko V17 \/ V172 \/ V174 \/ V175 \/ V176 Review and Battery Replacement Guide - Battery and Adapter Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.batteriestar.com\/blog\/2026\/09\/07\/seiko-v17-v172-v174-v175-v176-review-and-battery-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Seiko V17 \/ V172 \/ V174 \/ V175 \/ V176 Review and Battery Replacement Guide - Battery and Adapter Blog\" \/>\n<meta property=\"og:description\" content=\"If you are looking for a Seiko solar chronograph that combines quartz accuracy, long battery life, and relatively low maintenance, the Seiko V17 family is worth a closer look. One important point should be clarified first: Seiko V17, V172, V174, V175, and V176 are not five completely unrelated movements. 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