This is a Soviet era 8 day time only clock. It's not something I have ever seen before. It's rather well made and keeping time, though I think it's past due for a thorough cleaning.

The rear winding and setting design reminds me of WWII era German message center clocks.

Here is a view of the back with the large winding knob and a smaller setting knob in the center. I don't imagine this is all that valuable, but it's at least interesting. It came from the estate of a friend who was an author and expert in early Soviet era uniforms and equipment. He picked it up during one of his trips to the former Soviet Union doing research.