Maanshan world time
This watch was produced by Maanshan Shiba Watch Factory. It is an example of something not often seen -- a vintage Chinese world time watch. Instead of an hour hand, there is a rotating disc with places, mostly world cities, printed on it. Including 25 different time zones made it possible to simultaneously tell the time all over the world.
专利 90214385.1 is a patent number. The crown is marked with what looks like the Titoni logo and is possibly a replacement. The movement is signed ZHZ 894, indicating that it was produced by Hangzhou Watch Factory, probably in April 1989.