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Seiko W401-4020
The Seiko W401-4020 watch movement is an automatic movement with a sweep seconds hand and a calendar function.
The Seiko W401-4020 features the following functions:
- Automatic Winding
- Calendar
- Sweep Seconds
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.20 x 0.100 x 340 x 10.0 mm | GR2922X | Auto | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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Documents
Parts Listing
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