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Unitas 261
Ligne: 5.75 x 6.75'''
Jewels: 17
Power Reserve: 33 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1955
Size: 13 x 15.1 mm
Height: 3.85 mm
Hands: 1.10 x 0.65 mm
The Unitas 261 watch movement is a manually-wound mechanical movement that was predominantly used around 1955. While the exact differences between the 558 and 559 variants are not known, the 559 movement encompasses essential functions required for timekeeping.
The Unitas 261 features the following functions:
- Manual Winding
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|---|---|
| 4438 | Ordinary/None | Buy staff |
| 4438 | Incabloc | Buy staff |
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.15 x 0.070 x 180 x 6.0 mm | 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) |
|---|
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