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:
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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
Like all quartz movements, the VH31 is highly accurate, with a deviation of just ±15 seconds per month. This ensures your dive watch keeps precise time, even in challenging 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. -
Affordability
The VH31 offers exceptional value for money. It combines the smooth sweep of a mechanical movement with the affordability and reliability of quartz, making it an ideal choice for budget-conscious customers.
Why the VH31 is Perfect for Men’s Dive Watches
The VH31 movement is particularly well-suited for men’s dive watches. Here’s why:
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Smooth Motion Enhances Readability
The sweeping second hand of the VH31 makes it easier to track elapsed time, a crucial feature for divers who need to monitor their dive duration accurately. -
Quartz Convenience for Dive Watches
A quartz movement can be a practical choice for a dive-style watch because it offers accurate, low-maintenance timekeeping. However, actual diving capability depends on the complete watch—including water resistance, case construction, crown, crystal and testing—not on the VH31 movement alone. -
Low Maintenance for Active Lifestyles
Divers and outdoor enthusiasts need a watch that can keep up with their active lifestyle without requiring frequent servicing. The VH31’s low-maintenance design makes it a practical choice for adventurers. -
Aesthetic Appeal
The smooth sweep of the VH31 adds a touch of sophistication to dive watches, making them suitable for both casual and formal occasions. This versatility appeals to a wide range of customers.
Advantages of the VH31 Over Other Movements
When compared to other movements, the VH31 stands out for several reasons:
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Versus Traditional Quartz Movements: The VH31’s sweeping second hand offers a more elegant and premium look, setting it apart from standard quartz movements that tick once per second.
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Versus Mechanical Movements: While mechanical movements are prized for their craftsmanship, they are less accurate and require more maintenance. The VH31 combines the best of both worlds—smooth motion and quartz reliability.
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Versus Other Sweep Quartz Movements: The VH31 is more affordable and widely available than other sweep quartz movements, making it a cost-effective choice for watchmakers and consumers.
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. Here are six current Watchdives models that show how versatile a sweep-second quartz movement can be.
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-ticks-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 a practical choice for buyers who want field-watch character with quartz convenience.
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 strong BGW9 lume, sapphire crystal and a compact 45.5mm lug-to-lug.
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.
Why Choose a Dive Watch with a VH31 Movement?
For customers looking for a reliable, stylish, and affordable dive watch, the VH31 movement is an excellent choice. Here’s why:
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Precision Timekeeping: The VH31 ensures your watch keeps accurate time, whether you’re diving, hiking, or attending a business meeting.
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Durability: Built to withstand harsh conditions, the VH31 is perfect for adventurers and outdoor enthusiasts.
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Aesthetic Appeal: The smooth sweep of the second hand adds a touch of luxury to your dive watch, making it a versatile accessory for any occasion.
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Value for Money: The VH31 offers the look and feel of a high-end mechanical watch at a fraction of the cost.
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-steps-per-second centre seconds hand gives it a more fluid appearance than conventional one-step-per-second quartz movements, while retaining battery-powered convenience. This makes the VH31 suitable for a wide range of dive, field and everyday watch designs.
Ready to compare models? Browse our VH31 Watches collection to see current Watchdives and selected-brand watches powered by sweep-second quartz movements.
