Certina 17-25, Balance, complete, no: 721

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  New CERTINA original balance in factory sealed packaging.

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  Fits cal: 17-25, 17-251

Technical data Certina cal: 17-25

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  17 jewels, manual wind, sweep second.
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  S: = 7.75''' 17.2 mm.
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  H: = 3.7 mm.
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  N: = 19.800 A/h.
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  Power reserve: 44 h.

Versions:

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  17-25:
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  17-251: date.