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Gruen 431
Ligne: 11.5'''
Jewels: 7/17
Lift Angle: 46°
Power Reserve: 46 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1974
Diameter: 26 mm
Height: 5.4 mm
Hands: 1.30 x 0.80 x 0.21 mm
The Gruen 431 is a manual wind mechanical watch movement that features a pin-lever escapement. It consists of a ratchet on the dial side, accompanied by a crown mechanism with a rocker bar. This movement incorporates several functions, including sweep seconds, date setting by changing from 22:15 to 24h, and a calendar feature. The Gruen 431 movement was primarily used around 1974.
The Gruen 431 features the following functions:
- Calendar
- Date: set by changing 22:15-24h
- Manual Winding
- Sweep second
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.40 x 0.130 x 340 x 11.0 mm | GR3750 | Manual | Buy mainspring |
| 1.40 x 0.120 x 320 x 10.5 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
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