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Seiko B137-4020B
Jewels: 23
The Seiko B137-4020B is an open face calibre mechanical watch movement that is American made.
The Seiko B137-4020B features the following functions:
- American Made
- Open Face Calibre
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|---|---|
| 1209 | Ordinary/None | Buy staff |
| 1221 | Ordinary/None | Buy staff |
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.70 x 0.175 x 540 x 16.0 mm | MB | 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
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