In my father's collection of watches we came across a stainless (I believe, at least it's not rusted) Bulova Accutron, non day or date. Roman numerals. Bulova at the top. Accutron at the base of the display. I don't have it in front of me, but recall seeing M1 as a number under the case serial number. It uses a 395 battery. Also seem to recall the time adjuster to be centered, not low right when looking at the face. I am having my local jeweler clean it up and advise on further repair. The back had two circular access points - one for the battery and the other I don't know.
Will add photo later. But if any one can offer a suggestion to date and model, would be appreciated. Not concerned about value. It was my dad's and it is a Bulova, so it goes nowhere except to my son or daughter.