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Seiko W820-4000
The Seiko W820-4000 watch movement features a sweep seconds function, indicating a continuous seconds hand motion. With a beat rate of 18000 vibrations per hour (vph), this movement achieves precise timekeeping capabilities.
The Seiko W820-4000 features the following functions:
- Sweep Seconds
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
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Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.50 x 0.100 x 300 x 9.0 mm | GR4122 | Manual | Buy mainspring |
| 1.50 x 0.105 x 300 x 9.0 mm | GR4134 | Manual | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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Parts Listing
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