This ladies watch has the "square" shape date code on the movement, which would appear to date this watch as either a 1927 or 1936 model. The case back seems to have a date code after the word BULOVA but it's difficult to tell what it is as it's on the edge of the radiused portion of the back (photo included). I looked at the 1927 and 1936 models here but could not find an exact match, along with the ads from the 20s and 30s. I'm leaning towards a 1936 model as the bracelet by Bradfield has a patent number with a patent issue date of December, 1930 (and an application date of July 1927, but the patent number wouldn't have been assigned until the patent was issued in 1930, so the number wouldn't be known yet in 1927 to stamp on a 1927 bracelet). No movement model stamp apparent. There are no markings inside the case back except for some service engravings.
Movement: 15 jewels - Case size: 17 mm (not including crown) - Lug to lug: 35.5 mm
Dear poor mans Tahiti, you have a very nice watch here. Somewhere we have an ad (need to look it up) that identifies this as a nurse watch called Constance, most likely named after Constance Mabel Keys, a highly decorated nurse in WWI. Unfortunately, your seconds indicator is missing.
Very rare watch and a first for the MyBulova site. Great to see it in the metal. 1936 Bulova Constance is a match.
The Bulova Constance seems to be the only advert we have matching the subject watch at this time.
Thanks everyone for the ID and helpful info! I'm glad to be able to contribute a new example of this model year for this watch.