Thought I'd toss this one out there before dumping it in the unknown bin.
10AN 15J with O identifier. I'm assuming that means 1934 rather than 1925, based on the dial, but it could be a re-dial. Obviously, the hands are mismatched.
Case is hinged, but there's no patent date or anything else inside the case. Back of case is signed.
10k RGP
Crystal dimensions are tough. I don't think the current crystal is original or correct as evidenced by the amount of glue used to hold it in place. It really doesn't fit well. The case opening measures approx. 19.5 x 19.5.
In reply to Confirm the case is actually by mybulova_admin
In reply to I did state in my description by NOVA
I've got a hunch that the face and hands on this one are not original to the watch. With a period face and some cathedral hands this would be a nice watch. Possibly been replated as well.
Jay
In reply to I've got a hunch that the by vintagebulova.com
Don't think it has been replated. You can see a little wear-through in the corners on that smooth inner rim under strong magnification.
The dial also shows definite wear, which the camera didn't pick up. If it is not the original dial, it was reburbed some time back (or switched out).
Clearly someone tampered with the hands at some point, as in replaced the second hand?