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Seiko 4S28A
Ligne: 17'''
The Seiko 4S28A is a mechanical watch movement that offers the function of sweep seconds, allowing for the smooth and continuous movement of the seconds hand without visible ticking steps.
The Seiko 4S28A features the following functions:
- Sweep Seconds
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.20 x 0.185 x 440 x 15.0 mm | GR3050 | Manual | Buy mainspring |
| 1.20 x 0.190 x 440 x 15.0 mm | GR3054 | 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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