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Seiko 4N21-0990
The Seiko 4N21-0990 watch movement features Covered Winding.
The Seiko 4N21-0990 features the following functions:
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|
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
| Part Description | Reference # | Alternate | Buy |
|---|---|---|---|
| PALLET ARBOR | 72S/101P | 714/AM 350 | Buy part |
| ROLLER, 180X90X36 | 82S/43R | Buy part | |
| ROLLER, INCABLOC 180X90X36 | 82S/150R | Buy part | |
| SCREW, BARREL BRIDGE | 5105/8 | 8052/OME 180 | Buy part |
| STAFF | 100/1602 | Buy part | |
| STEM | 200/882F | Buy part |
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