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Alpina 431
(Alpina Straub)
Ligne: 11.5'''
Jewels: 1/17
Lift Angle: 52°
Power Reserve: 38 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1970
Diameter: 26 mm
Height: 4.8 mm
Hands: 1.80 x 1.30 x 0.20 mm
The Alpina 431 watch movement features a pin-lever escapement and a stem mechanism without a setting-lever spring. It has a strangely designed train and hand gear that are driven separately by the barrel. This movement offers manual winding capabilities and a sweep second function. It also includes a day and date display, with the day settable by +/- 24 hours and the date quicksettable by reverse setting. The Alpina 431 movement incorporates a pin lever and was commonly used around 1970.
The Alpina 431 features the following functions:
- Date: quickset by reverse setting
- Day and Date Display
- Day: set by +/-24h
- Manual Winding
- Pin lever
- Sweep second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|---|---|
| 5200 | Ordinary/None | Buy staff |
| 5199 | Ordinary/None | Buy staff |
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.40 x 0.110 x 340 x 10.0 mm | GR3700 | Manual | Buy mainspring |
| 1.40 x 0.105 x 300 x 9.5 mm | Manual | Buy mainspring | |
| 1.40 x 0.105 x 280 x 8.5 mm | GR3679 | 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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