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ETA 1231
Ligne: 13'''
Jewels: 1
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1965
Diameter: 29.33 mm
The ETA 1231 watch movement is equipped with a pin-lever escapement. This particular movement functions as a manual-wind chronograph with a timing capacity of 60 seconds and 45 minutes, utilizing a cam switching mechanism. Additionally, it features a sub-second hand and was predominantly used during the approximate time period of 1965.
The ETA 1231 features the following functions:
- Manual-wind chronograph, 60s, 45min, cam switched
- Sub Second
Balance Staff Listing
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Mainspring Listing
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Incabloc Part Listing
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KIF Part Listing
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