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Unitas 257
Ligne: 11.5'''
Jewels: 17
Lift Angle: 52°
Power Reserve: 43 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: 1961-1973
Diameter: 26 mm
Height: 4.45 mm
Hands: 1.50 x 0.90 x 0.20 mm
The Unitas 257 watch movement, used during the period from 1961 to 1973, features a manual wind feature and sweep seconds function. It incorporates a date function that can be adjusted by changing the 21-24 hour. The movement also includes Incabloc Shock Protection for enhanced durability. Various detail modifications were made during its production period. Additionally, the movement offers a calendar feature.
The Unitas 257 features the following functions:
- Calendar
- Date: set by changing 21-24h
- Incabloc Shock Protection
- Manual Winding
- Sweep second
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.30 x 0.110 x 320 x 9.5 mm | GR3284 | Manual | Buy mainspring |
| 1.30 x 0.105 x 300 x 9.5 mm | Manual | Buy mainspring | |
| 1.30 x 0.105 x 300 x 9.0 mm | GR3268 | 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
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