Denvosi watches are diamond brand watches produced by Shanghai Diamond Watch Factory.

In April 1969, my country’s first SMIA diamond brand mechanical watch using an off-center structure was launched at the Shanghai Stopwatch Factory. The predecessor of Shanghai Diamond Watch Factory was Shanghai De'an Clock Manufacturing Factory.

Diamond brand watches produced by Shanghai Diamond Watch Factory. In April 1969, my country's first SMIA diamond brand mechanical watch using an off-center structure was launched at the Shanghai Stopwatch Factory. The predecessor of Shanghai Diamond Watch Factory was Shanghai De'an Clock Manufacturing Factory.

Opened in the 21st year of the Republic of China. After 1954, it was renamed Jinsheng Clock Factory, Shanghai Stopwatch Factory, Shanghai Watch Factory No. 4, and in 1986 it was named Shanghai Diamond Watch Factory. It covers an area of ??14,600 square meters and has a construction area of ??23,800 square meters.

Early products were Diamond alarm clocks, electric clocks, wall watches, and stopwatches. Since 1980, it has formed a series of mass production mechanical watches and quartz electronic watches. From 1971 to 1985, it won the first place 10 times out of 17 national watch quality evaluations. Won the Ministry of Light Industry Quality Product Certificate, Shanghai Quality Product Certificate and Famous Trademark Certificate.