Bulova AEROJET from 1967
Just completed restoration, except for the dial. Case is all stainless steel, marked M7. Dial is marked Bulova Aerojet Waterproof. Has a very nice color to the dial, not sure if it is the original color or now has some patina. Hands were replaced with NOS. Crystal replaced with NOS. Added a brown leather strap that is marked Bulova AEROJET on the back; not the original strap, but goes quite well with the watch. Movement is a manual-winding 11ALC, M7 dated, 17 Jewel.
So far, there are no Aerojet ads in the database for this variant (non-automatic, non-calendar type).
Disregard my "model series" only discussion. The ad images from the 1960's threads were not loading for me while researching. I see now we do have Aerojet as a model name based on at least one 1967 ad. This model must have been released after the Spring 1964 price list release, so it wouldn't be in the list.