Record 666 (Longines 420)

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Flat hairspring, KIF-Flector shock protection. Longines cal: 420, 428 is based on this caliber with different bridge design. Data Record cal: 666 (Longines cal: 428). 17 jewels, ma nual wind. Size: 10.5''' 23.30 mm. H: = 2.50 mm. N: = 21600 A/h. Power reserve: 40 h. Versions: Record 666: no second. 667: sub second. Versions: Longines 420: sub second. 428: no second. 846: micrometic regulator, sub second. 847: micrometic regulator, no second. Show more