Bulova 1931 Ambassador
Hinged set-back Case measures 37mm lug to lug x 25mm non inclusive of the Crown using Calipers.
White Dial shows raised Gilt Arabic numerals and Bulova signature, tracks are printed in Black.
Hour and Minute Hands are Blue modern style and a modern style Seconds Hand appears on a sub-Dial obscuring the 6.
Caseback is stamped as shown.
vintage display ad is Dated 1934.