These have the caseback I prefer and, instead of Nanning movements, these also have ZJS (Shijiazhuang Watch Factory) standard/tongji movements
The blue version, with 3/6/9/12 indices unlike yestsrday's red variant.
Here's a spot (Cangyanshan) in the Taihang mountains. The bridge over the ravine is 1500 years old.
Curator: Alberta Museum of Chinese Horology in Peace River; Member: China Horologe Association; Chief Expert: China Watch Overseas Working Committee (CWOWC); Sino-Canadian Horological Cultural Affairs...