Certina 25-021-401, Winding stem

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  Certina original part. Not in factory packaging.

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  Thread 0,90

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  Fits cal: 25-021

Data Certina cal: 25-021 (ETA cal: 2763)

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  17 jewels, manual wind, sweep second, date, quickset.
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  S: = 11.5''' 25.60 mm.
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  H: = 4.0 mm.
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  N: = 21.600 A/h.
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  Power reserve: 50 h.

Versions:

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  25-02:
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  25-021: date.