No products in the cart.
Return To ShopWatch Database
Unitas 31
Ligne: 5.75 x 8.5'''
Jewels: 15/16
Power Reserve: 30 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1930
Size: 12.8 x 19.6 mm
Height: 3.8 mm
Hands: 1.10 x 0.60 mm
The Unitas 31 is a mechanical watch movement with a patented space-saving train design in two layers. It offers an optional bimetallic screw balance. Notably, there are no known differences between this movement and others in the series, including the 80, 86, 93, 113, 114, 116, 117, 128, 134, 144, 146, 148, 153, 157, 167, and 177. This movement is designed for manual winding and was commonly used in watches around the 1930s.
The Unitas 31 features the following functions:
- Manual Winding
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.45 x 0.080 x 260 x 7.5 mm | GR3923 | Manual | Buy mainspring |
| 1.45 x 0.080 x 250 x 7.5 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) |
|---|
Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
|---|
All watch database content © EmmyWatch LLC. Unauthorized redistribution of content is strictly prohibited. All rights are reserved.
