Why would you want to have a crystal in the bezel though ? if its a toolKinda looks more like a tool, some sort of movement holder? Never seen the name bold stamped on an accutron part like that exe for tool parts. It's a good mystery...
it’s watch size not large enough for clock ? I bought the remains off the bulova service centre 20 years ago so it might be some training tool or part ,Good question I agree, but I really don't see it being part of an actual watch, I think a training tool of some kind. I could certainly be mistaken. Come to think of it it could be a case for a clock that I haven't seen? But the engraving leads me to think training part.