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Seiko 4N21-0850
The Seiko 4N21-0850 is a mechanical watch movement with a chronograph function.
The Seiko 4N21-0850 features the following functions:
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) | |
|---|---|---|---|
| See More |
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
|---|---|---|---|
| CANNON PINION, HT 3.54 | 240/1153 | Buy part | |
| CHRONO SPRING | 8200/VAL 65 | 8200/VAL 65 | Buy part |
| CHRONO SPRING | 8325/VAL 65 | 8325/VAL 65 | Buy part |
| GIB/BOLT INCA 240X19 THICK | 400/1 | 180.19/INCA #11 | Buy part |
| HAMMER SPRING | 8350/VAL 65 | 8350/VAL 65 | Buy part |
| INCA UNIT COMPL, LOW D160 H11 | 400/34 | 100.20.11/INCA | Buy part |
| JEWEL, INCA BALANCE 135X50X11 | 400/13 | 111.11/INCA #10 | Buy part |
| JEWEL, INCA UPPER CAP 120X27 | 400/7 | 121.11/INCA #5 | Buy part |
| JEWEL, UPPER CAP INCA 120X18 | 400/8 | 122.11/INCA #6 | Buy part |
| LARGE OPERATING LEVER | 8140/VAL 65 | 8140/VAL 65 | Buy part |
| MINUTE RECORDER WHEEL | 8020/VAL 65 | Buy part | |
| SCREW, INCA 18X50 | 400/2 | 150.11/INCA #14 | Buy part |
| SHOCK SPRING, UPPER INCABLOC | 400/4 | 170.03/INCA #1 | Buy part |
| UPPER UNIT D370 H11 | 400/848 | 100.11.370.11/INCA | Buy part |
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