Here is what I believe to be a 1936 Bulova Commodore in 10k rolled white gold. I acquired this recently and it is not currently running but am hoping to find a place to make it work again.
Case measures 32mm lug to lug x 26mm non inclusive of the Crown.
The crystal is in near perfect condition, which is surprising with how old it is. It almost looks brand new and appears to be original. I thought this was a 1938 Apollo but after closer inspection it has a square movement symbol rather than a moon like the link below.
Overall in amazing shape and the case back bears the American Standard Shield symbol.