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- FHF Cal. 81 - Balance with flat hairspring 721
Brand | FHF |
---|---|
Calibre | FHF 81 |
International reference | 721 |
Compatibility | FHF 81, FHF 81-2, FHF 811, FHF 811-2, FHF 814, FHF 815 |
State | Never used |
Year of production | 1965 |
Caliber diameter | 23.7 mm |
Caliber height | 3.5 mm |
Frequency | 18'000 Bpm |
Power reserve | 45h |
Ruby | 17 |