Shanghai Watch Factory 上海手表厂 opened in 1958 after three years of trial production of early China-made watches. It soon became China's most prominent and productive watch factory, manufacturing about 120 million watches by 1995. After restructuring around the turn of the century, it continues to produce watches under the name Shanghai Watch Industry Co.

Factory codes: DSZ, SB, SS, ZJSH, ZSH 

Possible factory codes: DSH, NSH, OSH, JHB, ZCSH, ZJH