Thought I would show you one of my Wife's Watches, I thought it might be a model 156 but I can't match the engraving in any of the Advert's. The case measures 24.70mmx24.70mm not counting the lugs or crown, measures 28.40 lug to lug.
On the dial if you look sideways in a bright light with a loupe you can see a verry faint impresion of the word Bulova. We have had it for years, runs great. I would like to find a period band for it if anyone has any suggestions.