IWC 8531

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Serial no: 1 517 165, (aprox: 1962). Data: 8531 21 jewels, automatic winding, date. Size: 13''' 29,0 mm. H: = 6,40 mm. N: = 19800. Power reserve: 44 h. Versions: 13''' (1952 - 1964 ). 85: center second. 851: center second. 852: center second (1952 - 1958). 8521: center second (1953 - 1958). 853: center second (1958 - 1963). 8531: center second, date, H=6.40 mm (1959 - 1964). Versions: 12,5''' (1964 - 1996). 854: 21-25 jewels, center second, H=4.85 mm (1964 - 1976). 854B: 23-25 jewels, stop mechanism, H=4.85 mm (?). 8541: 21-25 jewels, date, stop mechanism, H=5.90 mm (1964 - 1976). 8541B: 23-25 jewels, date, stop mechanism, H=5.90 mm (1976 - 1996). Show more