What is the VH31 Movement?
The VH31 is a three-hand sweep-second quartz movement from TMI (Time Module Inc.). Unlike a conventional quartz movement that typically advances the seconds hand once per second, the VH31 moves the centre seconds hand four times per second, producing a noticeably smoother sweep that visually resembles a mechanical watch more closely.
It still retains the main practical advantages of quartz: battery-powered operation, good accuracy and low maintenance. According to TMI, the VH31 uses an SR920SW battery with an estimated battery life of approximately two years.
Looking for watches that use this movement? Explore our VH31 Watches collection to compare current sweep-second quartz dive, field and everyday models by size, style and price.
Key Features of the VH31 Movement
Here’s what makes the VH31 movement stand out:
Smooth Sweeping Seconds Hand
The VH31 moves its seconds hand four times per second instead of the typical once-per-second step of a standard quartz movement. This creates a smoother visual effect while maintaining the convenience of quartz.High Accuracy
TMI specifies VH31 accuracy at normal temperatures as less than ±15 seconds per month. Actual performance can vary with operating conditions.Low Maintenance
The VH31 uses an SR920SW battery, with TMI specifying an approximate battery life of two years.Practical Operating Specifications
TMI specifies an operating temperature range of -5°C to +50°C for the VH31, along with antimagnetic resistance of at least 1,600 A/m. As with any watch movement, overall durability and water resistance depend on the complete watch construction rather than the movement alone.Accessible Sweep-Second Quartz
The VH31 is widely used in affordable three-hand watches because it combines battery-powered convenience with a smoother-looking seconds hand. The movement alone does not determine the quality, durability or water resistance of the complete watch.
When the VH31 Makes Sense in a Dive-Style Watch
The VH31 can be a practical movement choice for a dive-style watch, but diving capability comes from the complete watch rather than the movement itself.
Smooth Seconds-Hand Motion
The four-step-per-second sweep gives the display a more fluid appearance than conventional one-step-per-second quartz. For elapsed-time tracking on a dive-style watch, the rotating bezel is the primary timing reference; the seconds hand is mainly useful as a visible indication that the watch is running.Quartz Convenience
Battery-powered operation offers accurate, low-maintenance timekeeping. Water resistance, crown construction, bezel design, crystal and testing should be checked on the individual watch listing.Useful for Grab-and-Go Watches
A VH31 watch can suit buyers who want to pick up a watch after several days and have it running without winding or resetting the time, subject to normal quartz accuracy and battery condition.Works Across More Than Dive Watches
The same movement can work in field, military, vintage-inspired and everyday designs. Choose the complete watch by size, water resistance, dial layout and intended use—not by movement name alone.
Advantages of the VH31 Over Other Movements
How the VH31 compares depends on what you value:
Versus Conventional Quartz: the main visual difference is the four-step-per-second centre seconds hand, while retaining battery-powered operation.
Versus Mechanical Movements: quartz generally offers greater timekeeping accuracy and less routine movement maintenance, while mechanical watches appeal for their mechanical construction and winding experience.
Versus Other Sweep-Second Quartz Options: compare the complete watch rather than choosing on sweep rate alone. Case size, crystal, water resistance, dial layout, bracelet or strap, and current price can matter more in daily use.
Featured VH31-Powered Watches
The VH31 movement works particularly well across different watch styles, from compact dive watches to military-inspired field watches and everyday designs. The examples below show how versatile a sweep-second quartz movement can be. Availability can change by configuration, so check each linked listing before ordering.
1. Watchdives WD7922
The WD7922 is a compact 37mm vintage-inspired dive watch with a 45.5mm lug-to-lug and slim 11.4mm profile. Its VH31 movement provides smooth four-step-per-second seconds-hand motion, while sapphire crystal, 200m water resistance and a 316L stainless steel case make it a practical everyday diver.
2. Watchdives WD1969 Pro
The WD1969 Pro combines a compact 38mm case with a clean no-date dial, strong BGW9 lume and distinctive dimensional detailing. Powered by the VH31 sweep-second quartz movement, it offers smooth seconds-hand motion together with sapphire crystal, a screw-down crown and 200m water resistance.
3. Watchdives WD1972
The WD1972 takes a more military-inspired approach, with a sandblasted stainless steel case, highly legible dial and compact 46mm lug-to-lug measurement. Its VH31 movement, sapphire crystal, screw-down crown and 200m water resistance make it an example of field-watch character combined with quartz convenience.
Availability note: this model has previously been out of stock. Treat it as a VH31 design example and check the linked listing for current availability before ordering.
4. Watchdives WD1980
The WD1980 is a slim 39mm military field watch designed for comfortable everyday wear. At only 9.6mm thick, the VH31-powered no-date version combines a smooth sweep-second display with BGW9 lume, sapphire crystal and a compact 45.5mm lug-to-lug.
Movement choice matters: current no-date configurations use the VH31. Day-date configurations use a Ronda 517 movement, so choose a no-date option if you specifically want VH31 sweep-second quartz.
5. Watchdives WD1965
The WD1965 brings vintage dive-watch proportions into a compact modern package. Its approximately 37mm case, 45.5mm lug-to-lug and 11.1mm thickness make it especially wearable, while the VH31 movement, domed sapphire crystal and 200m water resistance add modern everyday practicality.
6. Watchdives WD1016
The WD1016 is a compact 37mm Explorer-inspired everyday watch with a 45.5mm lug-to-lug and slim 10.9mm profile. Its VH31 movement provides quartz accuracy and smooth seconds-hand motion, while sapphire crystal, a screw-down crown and 100m water resistance make it a versatile option for daily wear.
Which VH31 Watch Should You Choose? Four Current Buying Scenarios
The best VH31 watch depends on how you plan to wear it. The following choices were checked against current Watchdives listings on September 16, 2026; stock can change after publication.
| Use case | Current model | Why it fits | Key point before buying |
|---|---|---|---|
| Compact vintage-style dive watch | Watchdives WD7922 | 37mm case, sapphire crystal and 200m water resistance | Choose the dial, bezel and lume configuration you prefer |
| Modern 38mm tool-style diver | Watchdives WD1969 Pro | 38mm case, sapphire crystal, 200m water resistance and strong BGW9 lume | Availability varies by dial, indices and clasp combination |
| Slim military / field-style everyday watch | Watchdives WD1980 V3 | 39mm case and 9.6mm thickness make it easy to wear | Select a no-date configuration for VH31; day-date uses Ronda 517 |
| Vintage 50-fathoms-inspired everyday diver | Watchdives WD50Q V2 | 38mm case, VH31 movement, sapphire crystal, 200m water resistance and strap/bracelet choices | Bezel and band details vary by selected configuration |
If none of these matches your preferred size or style, browse the VH31 Watches collection and compare the current listings rather than choosing by movement name alone.
How to Choose a VH31 Watch
Start with the use case: a rotating-bezel dive-style watch, a compact field watch and an everyday Explorer-style watch can all use the same VH31 movement but wear very differently.
Check case size and thickness: dimensions often matter more on the wrist than the movement itself.
Check the complete water-resistance specification: movement choice does not establish diving capability. Review the crown, case, crystal, bezel and stated water resistance of the individual model.
Check the exact variant: some product pages combine different movements or hardware under one listing. WD1980 is a clear example: no-date versions use VH31 while day-date versions use Ronda 517.
Confirm current availability: stock and configurations can change, so use the linked product page as the current source of truth before ordering.
Conclusion
The VH31 is an appealing option for buyers who want quartz accuracy and low-maintenance ownership with a smoother-looking seconds hand. Its four-step-per-second centre seconds hand gives it a more fluid appearance than conventional one-step-per-second quartz movements while retaining battery-powered convenience.
The movement works across dive-style, field, military and everyday watches. For a purchase decision, compare the complete watch—especially size, water resistance, crystal, bezel, strap or bracelet and exact variant—rather than choosing on the movement alone.
Ready to compare models? Browse our VH31 Watches collection to see current sweep-second quartz watches and their live configurations.
