Longines 6651

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Longines caliber 430 was launched in 1967 after Girard Perregaux introduced a 36.000 A/h movement in 1966 (cal: 31.5). The increased wear and lubrication issues in a 36.000 A/h mov ement made Longines to redesign these movements to 28.800 A/h versions, launched in 1972. For parts to the 66XX calibers, see cal: 430. Movement serial number: 52 072 024 (1972). Technical data Longines cal: 6651 25 jewels, manual wind, sweep second, date. Size: 11.5''' 26.50 mm. H: = 4.80 mm. N: = 28.800 A/h. Power reserve: 42 h. Versions: 36.000 A/h, 17 jewels. 430: base caliber. 431: date. 432: no second. 433: no second, date. Versions: 28.800 A/h. 6641: 25 jewels, adjusted in 4 pos. 6642: 17 jewels. 6651: 25 jewels, date, adjusted in 4 pos. 6652: 17 jewels, date. Show more