![FHF 57, Setting lever spring, no: 445](http://urdelar.se/cdn/shop/products/aaaaa_1_60c262da-6834-4e09-8ada-894b14dc70a0_{width}x.jpg?v=1609711555)
FHF 57, Setting lever spring, no: 445
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New original part in factory sealed packaging.
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Fits cal: 57, 57-21
Technical data: FHF: 57
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17 jewels, manual wind, sweep second. -
Size: 6.75''' 15.3 mm. -
H: = 4.0 mm. -
N: = 18.000 A/h. -
Power reserve: 40 h.
Versions:
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57: 18.000 A/h. -
57-21: 21.600 A/h.