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Unitas 31
Ligne: 8 x 9'''
Jewels: 17
Power Reserve: 44 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1935
Size: 18.6 x 20.8 mm
Hands: 1.20 x 0.65 / 0.15 mm
The Unitas 31 watch movement is a mechanical movement featuring a bimetallic screw balance. It shares similarities with the ETA 865, 868, 870, and 874 movements, but the differences between them are not known. The Unitas 31 movement specifically includes an indirect sweep second function. It is a manual wind movement with sweep seconds, and it was commonly used around the year 1935.
The Unitas 31 features the following functions:
- Manual Winding
- Sweep second
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.50 x 0.090 x 300 x 8.5 mm | GR4101 | Manual | Buy mainspring |
| 1.50 x 0.095 x 280 x 8.5 mm | GR4111 | Manual | Buy mainspring |
| 1.50 x 0.090 x 280 x 8.5 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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Documents
Parts Listing
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