Shanghai Watch Factory Caliber A611

Manufacturer	Shanghai Watch Factory (上海)
Caliber Number	A611, A-611, A611A
Jewels	17
Beats per hour	18,000 vph
Power Reserve	40 hours
Anti-Shock System	None
Hand-Windable?	Yes
Hacking Seconds?	Yes
Functions	Hours, minutes, central seconds
Country of Manufacture	China
Known Models	(Add yours to the comments below…)

The Shanghai caliber A611 is a 17 jewels (17 zuan) manual wind mechanical movement. It is based on the Shanghai caliber A581. This caliber was produced from circa 1961 – 1967.