Certina 29-0631

Data: Certina cal: 29-0631 (Valjoux 234).

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  17 jewels, manual wind, 60s, 45 min chronograph, date.
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  Size: 13''' 29,50 mm.
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  H: = 6.47 mm.
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  N: = 21.600 A/h.
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  Power reserve: 48 h.

Versions:

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  29-052: Hour counter (Valjoux 72).
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  29-053: Date.
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  29-062: (Valjoux 726).
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  29-063: Date, same as 29-053, minor modifications.
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  29-0631: Date, (Valjoux 234), minor modifications.
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  29-064: (Valjoux 728).