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Seiko 5S21A
The Seiko 5S21A watch movement features sweep seconds, shock protection, and KIF shock protection.
The Seiko 5S21A features the following functions:
- Shock Protection
- Sweep Seconds
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.50 x 0.105 x 300 x 9.0 mm | GR4134 | Manual | Buy mainspring |
| 1.50 x 0.110 x 300 x 9.0 mm | GR4149 | 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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