A look at the movement could help. Bulova didn't always use their own movements though they often improved upon others movements. The watch reminds me of what were selling in the late sixties early seventies. Looks to be stainless steel. Bulova used AS 1012 for the 5AB, 5AC and 5AF movements though these were used earlier, between 1930's-50's. Bulova produced the 5AD in 1952, continuing the model theough to 1966 as 5AR. The 5AH in 1960 and the 5AN in 1966. The 5BA, BC and BD series were made in 1972.