Original Japan Seiko TMI VH31 Quartz Movement 3 hands Sweep second
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Original Japan Seiko TMI VH31 Quartz Movement 3 hands Sweep second
TMI VH31 Sweeping Quartz Movement
The TMI VH31 is a premium 3-hand quartz movement featuring a smooth sweeping second hand that mimics the appearance of a mechanical watch while maintaining the accuracy, reliability, and low maintenance of quartz technology. It is widely used in custom watch builds and modern field, pilot, and dive watches.
Specifications
| Specification | Details |
|---|---|
| Manufacturer | TMI (Time Module Inc. / Seiko Group) |
| Caliber | VH31 |
| Movement Type | Quartz |
| Display | Hours, Minutes, Central Seconds |
| Sweep Rate | 4 beats per second (smooth sweep) |
| Accuracy | ±15 seconds per month |
| Battery | SR920SW (371) |
| Battery Life | Approx. 2 years |
| Diameter | 23.7mm (10½ ligne) |
| Height | 3.45mm |
| Jewels | 0 (VH31B) / 2 (VH31A) |
| Frequency | 32,768 Hz quartz oscillator |
| Hacking Seconds | Yes (second hand stops during setting) |
| Date Function | No |
| Anti-magnetic | ≥1600 A/m |
Key Features
- Smooth sweeping second hand (4 ticks per second)
- Quartz accuracy with mechanical-style appearance
- Slim 3.45mm profile
- Low maintenance and long battery life
- Ideal for custom watch projects and everyday wear




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