This watch was my grandmother’s - it does work. She was born in 1902. Her initials before her marriage are on the back. Other numbers from the inside - 31592, 5AP or SAP? Two 2 ADJ? We are unsure if the last number of the serial number we think a 6. Or a C? Patent June 20, 1924. It is stamped 14k.
Dear kmrkupiec, your watch is the Geraldine from 1926. Beautiful watch with intricate engraving. The last digit is a 0. I changed the listing already.

A beautiful heirloom, you are very fortunate!
1926 Geraldine.
That's a great watch to have if your Grandmother's. I agree it's the "Geraldine". I wonder if she got it as a gift? Did she save up and get it for herself? I love thinking about the history on these.
1926 Bulova Geraldine is a good match.
Welcome to myBulova and thank you for sharing your grandmother's watch with us. What a beautiful heirloom to have and with her initials is very special. My grandmother's graduation watch is what started me collecting. Yours is very nice being solid 14k. It would be a 5AP movement model with 2 adjustments. I agree with Alex that the last digit in the case serial number is a 0.
1926 Bulova Geraldine