Thank you for viewing. This is a combined Mao Zedong clock and manual calendar purchased in Shanghai about 20 years ago. I bought it at a flea market-like place, so it has a general used feel. There is a mainspring on the back, and when wound, the second hand of a fighter plane and the hand of a girl holding a book move. There are no instructions, so I don't know how to operate it. Since it is not practical as a clock, I hope you will understand it as an antique ornament. Thank you for your consideration.