Just picked this beauty up. Hands don't match the 1928 ad, but match the other 1927, 28, 30 and 32 examples in the database. I suspect the ad illustration dates to 1926 and was re-used thereafter. Clean accurate running watch appears unrestored. Plating worn off face of crown, otherwise really clean with lots of jeweler marks inside the single hinge case. Grain of band even matches the 1928 ad, and appears period.. Original 1927 pat. dust cover and ring in place.
I always think of this as being the Treasurer, by remembering the plain bezel style is the 'lower' Banker and the engraved bezel is the 'higher' Treasurer.
1928 Bulova Treasurer.
I believe that the hands are the correct style for this year, but may be a replacement set, due the lume color difference,