Movement Serial No.:
Case Serial No.:
Circle date code 1934. No Ads no examples.
6AB (poor stamping, but definitely a 6AB) movement listed in database as 1935 only. Here is a 1934 example for you. Bulova stamped on edge of the case, nothing but jewelers marks on the inside, no patent date just blank. Dust cover missing but it ticks. If not the original braclet it is very old.