This appears to be a 1967 Bulova Banker "H". The case is a yellow gold plate case with a stainless steel case back with M7 date code. The movement is an 11AL 17J movement also with a M7 date code. The dial is a slate gray almost blue. Found the ad in the 1967 Line book BAWD0168 page 9 of 58.
Case Serial No.