I believe this a 1929 Gladiator, The Bulova case does not have any markings anywhere as to Gold content, whether or not it is filled or solid.
There is no F (for filled) on the bezel as is common on these older watches. I took the case to three jewelers, the first one said "Sorry no Gold content, however if you want to sell it I'll give you a Hundred dollars". Second one said 10K Solid Gold. Third one (who has one of those fancy machines) said 14K Solid Gold, so I'm not sure.
The dial is as found, just cleaned it up. The Crystal came from Darren, it is for a Gladiator but I had to file about .05mm from the sides and ends.
The case measures 37.02mm lug to lug and 26.60mm not including the crown.
Click below for 1930 Gladiator Advert.