Bulova 1924 Princine
I picked up this really early ladies watch. The watch needs a good cleaning and a lug repair, but all in all not to bad for the year.
I believe this to be the model as there are several 1924 Ads which seems to work.
EDIT 2012.10.17 Corrected typo in movement field from 6AT to 6TA based on photos. Will