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- FHF Cal. 64 - Regulator with adjustable stud holder, for flat hairspring 307
Brand | FHF |
---|---|
Calibre | FHF 64 |
International reference | 307 |
State | Never used |
Year of production | 1955 |
Caliber diameter | 19.7 mm |
Caliber height | 4.3 mm |
Frequency | 18'000 Bpm |
Power reserve | 41h |
Ruby | 17 |