Shanghai A-581 Shanghai's first general production watch (1950s-60s)

Black A-581 very rare (roughly 30-1 white to black dial ratio). I mentioned, but did not show, this during the discussion.

Shanghai A-581 movement (note no shockproof...that came later with A-611)

Beijing Watch Factory BS-2 first larger distribution Beijing watch (BS-1 was much smaller run and very rare)

Tianjin (now Sea-Gull) 51/WuYi brand w/62-A movement. WuYi was Tianjin's first general distribution brand.

Later (mid 70s) SZB-1 with lacquer dial

Beijing ZB-SK day-date very rare day-date, never commercially distributed - the S in SK may refer to Shizhi or "test run".

Qingdao Watch factory "Gongnong" "Workers and Peasants" branding (roughly 1966--clearly cultural revolution branding)

Gongnong caseback

Liaoning SL-1 watch , early-mid-1960s

Hongi or "Red Flag" brand  by Liaoning Watch Factory (1970s) now Liaoning Peacock, maker of modern tourbillons etc, and SL-3006 used by Atelier Wen

Modern Atelier Wen with Liaoning SL-3006 automatic mechanical movement with bi-directional winding, no phantom click (special for Atelier Wen)

Modern Beijing Zunda w/In-house Beijing 2C14 automatic movement

More modern (early 2010s) Sea-Gull M185SP w/ST16 "in-house" 21 jewel automatic