Looks like a 1924 Bulova 'Norma' or 'Juno'. It's in good condition with the original crown. The dial (possibly sterling silver) could use some cleaning & it needs a new crystal.
Dear Silvercloud, indeed there was some confusion about the name in the December 1924 newspapers where the watch got two names: Norma and Juno. Your watch however is earlier than this first ad so I would go by the name, or better said “number” this model had prior to those ads: 6720.
By the way, you will find there is a number 1 stamped before the 39. Can you update the serial number? Thanks!
Based on other examples and the notion that gold filled had a different number than the solid gold cases (usually one number below), I believe this one should also be ID'd as a 6519 the same as these other examples:
Generally speaking this is what I've observed:
First number of Ladies Models:
1 = 10 ligne
5 = 5 ligne
6 = 6 ligne
9 = 9 ligne
Second number of Ladies Models:
5 = 15 jewels
7 = 17 jewels
8, 9 = 17 jewels with platnuim/gold case with set gems (diamonds and/or sapphires)
Last two or one digit of Ladies Models:
Even = Solid Gold case
Odd = Gold Filled, Platinum or Silver case