Old watch, New user

Hi all, i have had this watch for years and trying to look into the history of it. Can anyone help with the hallmarks please?

I’m not expert on watches or German silver, but the crescent moon and crown indicate German solid silver, which is usually 80% pure, but can be higher. Maybe that’s a starting point, or someone else here may know more. There are some who know a lot about watches, I believe.