FHF 55, 551, 552, 553 (10.5''') 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 cal: 55, 55-2, 55-4, 551, 552, 552-2N, 552-6, 553, 553-2, 553-2N

Technical data: FHF: 55

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  15/17/19/21 jewels, manual wind, sweep second.
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  Size: 10.5''' 23.6 mm.
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  H: = 3.6 mm.
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  N: = 18.000 A/h.
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  Power reserve: 39 h.