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- FHF Cal. 77-21 - Balance with flat hairspring 721
FHF Cal. 77-21 - Balance with flat hairspring 721
id:
FHF_77-21_721
CHF 377.00
| Brand | FHF |
|---|---|
| Calibre | FHF 77-21 |
| International reference | 721 |
| Compatibility | FHF 721N |
| State | Never used |
| Year of production | 1940 |
| Caliber diameter | 15.3 mm x 16.4 mm |
| Caliber height | 3.53 mm |
| Frequency | 21'600 Bpm |
| Power reserve | 42h |
| Ruby | 17 |