I purchased this one as "needs repair" in a group of three that I paid less for than the value of one other in the group. This one got set aside. Yesterday, I got it out, added a band and wound it. It immediately started running and after 24 hrs is off less than a minute. Apparently the needed repair was the addition of a band. A very pleasant surprise, indeed!
It wasn't until I started playing with it that I realized it's a case configuration I don't believe I have ever seen before. It is a 2 toned hinged case; the bezel is all yellow gold (unengraved) and the back appears to be stainless. The only stamping is "Bulova Quality" and a S/N 3173338 on the inside and "411811" on the back. It has a multitude of jeweler's marks as well.
Movement is housed in a retaining ring with a dust cover. It was very difficult to remove the movement from the case back, a very tight fit.
As close as I can come is a Senator variant. Referenced ad is dated 1933 and is a face match to subject watch. Hands don't match ad, but face/hands combination matches this one in Db