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Shanghai Fangzhen

Shanghai Fangzhen (Shockproof) Quangang (All steel) 1524 17 zuan. Chinese hand wind vintage watch. SS1-K movement based on Swiss AS1187 (?). Lift angle 52 14' (?) This is an improved version of the SS1 movement developed in 1972 by Shanghai Watch factory. It was the first national grade 1 movement by the factory, but was 3 years later than the SM1 movement by Shanghai Stop Watch factory. SM1 was probably the 1st national grade 1 movement made in Shanghai. A coupe of million movements were made, and was used for 1524 model watches until about 1974. The same size as SS1 / 21600 bph / ± 30S/day / 45 hours power reserve

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