Seems like a good idea. I'll give it a shot!If it's 0s, then in theory you can search for vintage 0s wristwatch cases. Of course, most of the ones you'll find will already have movements in them. If you're looking for a new case, you're kinda in the wrong forum; the watchmakers forum might have some leads. For the time and effort though, you're probably farther ahead to look for existing 0s wrist watches from the 20's or 30's.