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Hamilton 31
Ligne: 10.5'''
Jewels: 15
Power Reserve: 31 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1930
Diameter: 23.6 mm
Height: 4.2 mm
Hands: 1.35 x 0.70 / 0.16 mm
The Hamilton 31 watch movement is a manual wind mechanical movement with sub second function that was utilized around the period of approximately 1930. The precise differences between the ETA 390 and Hamilton 31 movements are not currently known.
The Hamilton 31 features the following functions:
- Manual Winding
- Sub Second
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.60 x 0.115 x 240 x 9.0 mm | GR4522 | Manual | Buy mainspring |
| 1.60 x 0.120 x 240 x 9.0 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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Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
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