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Seiko 4N21-5020
The Seiko 4N21-5020 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 |
|---|---|---|---|
| CLICK & SPRING COMBO | 434/LEC 8NR | Buy part | |
| CLICK, COMBINATION | 434/LEC 496 | 434/LEC 496 | Buy part |
| ESCAPE WHEEL | 705/LEC 8NR | Buy part | |
| MAINSPRING T-END | 770/LEC 8NR | Buy part | |
| SET WHEEL | 450/LEC 496 | Buy part | |
| STEM, BACKWIND | 200/1015F | 401/LEC 496 | Buy part |
| THIRD WHEEL | 210/LEC 496 | Buy part |
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