Here is an interesting one. Movement is dated 1934, case S/N seems to indicate 1933. Two tone Ambassador with 6 digit s/n on outside end of case back. The other end is marked "10K Rolled Gold Plate". The only stamping on the inside of caseback is "Bulova Quality". Do we date this to the case or movement?
Interesting note: as of this posting on 10/10/19, there are 17 Ambassadors in this case style (1933-37) in the database, only 2 of which are two tone (one 1933 and one 1934).
Watch came to me without a band, I added the NOS Bristol scissor band as seen. Watch is overall quite clean with light wear and currently keeping time.
Referenced ad showing either white gold or the two tone option is dated 1934.