I posted this watch a couple of years ago and thought I would give you another look at it.
I bought this watch about 10 years ago from a vintage watch dealer and the story goes (for what it's worth) that he bought it at an estate sale from the Daughter (who was elderly) of a man that worked for Bulova in R&D back in the early days. She believed that her father designed this watch and Bulova never put it in to production.
The case measurements are 37.35mmx26.80mm, it's a good size watch. The 9AN movement has a triangle on it that would date it to 1926, the movement also has a serial #300371.
The back of the dial is stamped 301321ZJ, I wonder if these are the correct hands to go with this dial?
My jeweler tested the Case back and Bezel and it is 14K white and 14K yellow Gold.