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Omega 640
Ligne: 19'''
Jewels: 15
Power Reserve: 41 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1935
Diameter: 42.9 mm
Height: 5.3 mm
Hands: 1.95 x 1.00 / 0.28 mm
The Omega 640 watch movement is an open face calibre with options for a bimetallic screw balance and a Breguet hairspring. There are no known differences between the 40, 42, 44, 46, and 48 versions, except for varying bridge layouts. It features stem winding and setting, as well as a sub second display. The Omega 640 movement was commonly used around 1935.
The Omega 640 features the following functions:
- Stem wind and set
- Sub Second
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 2.30 x 0.200 x 460 x 16.0 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) |
|---|
Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
|---|
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