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Seiko 1421-5720
The Seiko 1421-5720 features the following functions:
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.60 x 0.080 x 260 x 7.0 mm | GR4446 | 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 |
|---|---|---|---|
| MAINSPRING 1.60-.08-260 7 | MS-713H | GR 4446 | Buy part |
| STAFF, N/SHOCK | 100/34A | 100/FEF 370 | Buy part |
| STEM, TAP 10 | 200/326F | 401/FEF 270 | Buy part |
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