Nanchang 南昌 Lushan 庐山 (Mount Lu)

Model :Lushan 庐山
Manufacturer : Nanchang Watch Factory 南昌手表厂
Year of Production: 1981(?)
Case Diameter : 
Weight w/o strap: g 
Movement Model : Standard Movement ZNCA (17 jewels) 
Type : Hand Wind

Nanchang Watch Factory is located in Jianxi Province 江西省. This watch is named after the world renowned mountain, i.e. Mount Lu, in that province. Mount Lu is listed as World Heritage by UNESCO and the essence of it is captured in these few words by UNESCO:
"Mount Lushan, in Jiangxi, is one of the spiritual centres of Chinese civilization. Buddhist and Taoist temples, along with landmarks of Confucianism, where the most eminent masters taught, blend effortlessly into a strikingly beautiful landscape which has inspired countless artists who developed the aesthetic approach to nature found in Chinese culture." (see link)
Here is the link about Mount Lu.

The logo is of course the mountain itself. The watch is powered by 17J standard movement. The factory code on the movement is "ZNCA" and is roughly inscribed. "Z" = Zhongguo standard movement, "NC"=Nanchang Watch Factory and "A", I think, is code for movement with no calendar. There is also a code below the balance wheel which is "NC81". See photo here. The "81" could be year 1981.

The centre of the caseback is the logo and surrounded with the words "全钢“ (all stainless steel), "南昌手表厂" (Nanchang Watch Factory), "防震“ (anti-shock), "ZHONGGUO JIANXI" (China, Jianxi).

More shots are here: