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Seiko 1421-5640
The Seiko 1421-5640 watch movement features a sweep seconds function and jump hour function.
The Seiko 1421-5640 features the following functions:
- Sweep Seconds
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.50 x 0.120 x 320 x 9.5 mm | GR41761 | 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
| Part Description | Reference # | Alternate | Buy |
|---|---|---|---|
| ARBOR, THREADED PALLET | 72S/163P | 714/BET 8320 | Buy part |
| MAINSPRING 1.50-.12-320 9,5 | MS-695M | GR 4176 | Buy part |
| ROLLER | 82S/287R | Buy part | |
| STAFF, KIF HT 2.85 | 100/2473 | Buy part | |
| STEM | 200/1582F | Buy part | |
| STEM, SPLIT | 360/377 | /BET 8341 | Buy part |
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