10an with center sweep second possibly 1934?
JUST... got this watch this afternoon. I suspected in the sale photos that it was unusual but boy howdy.
Hinged case, case serial# 441508, movement serial # 637253 15 jewel 10 an movement.
The case is 10k Rolled gold plate and the only Bulova indication on the case is just above the 10k marking. Nothing but service marks on the interior of the case.
By the word unadjusted on the movement is what looks like a circle date mark. 1934.
Of course nothing even close in the ad section.