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Seiko 1000-3720
The Seiko 1000-3720 watch movement features a sweep seconds function and employs a pin lever mechanism.
The Seiko 1000-3720 features the following functions:
- Pin lever
- Sweep Seconds
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.55 x 0.080 x 260 x 7.0 mm | GR4378 | Manual | Buy mainspring |
| 1.50 x 0.080 x 260 x 7.5 mm | GR40771 | Manual | 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) |
|---|
Documents
Parts Listing
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