FHF 81, Winding stem, no: 401

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  New original part, not in factory packaging.

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  Thread: 90

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  Fits FHF cal: 81, 81-2, 82, 82-4, 811, 811-2, 821, 821-4

Technical data: FHF: 81

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  17 jewels, manual wind, sub second.
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  Size: 11.5''' 23.3 mm.
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  H: = 3.5 mm.
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  N: = 18.000 A/h.
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  Power reserve: 45 h.

Versions:

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  81: 10.5'''
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  81-2: 10.5''' date.
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  82: 10.5'''
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  82-4: 10.5''' date.
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  811: 11.5'''
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  811-2: 11.5''' date.
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  821: 11.5'''
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  821-4: 11.5''' date.