I'm going to make an educated guess that the red enamel was aftermarket when the stones broke or fell out. Those spots are very common for Bulova to have stones in during that time period, blue or green as a rule. I've seen some red ones for sale recently, but I think those are aftermarket as well as they are to inconsistant with what we've seen.
Though they could have been a special order from an individual jeweler, in my humble opionion they were not factory sent.
In reply to I'm going to make an educated by plainsmen
It seems like an odd shape for stones, like almost rounded on the outside. Would they have been triangular or actually rounded? I believe this to be my grandmothers watch and she grew up in Brooklyn, NY and would have been in her mid-twenties so perhaps a gift from my grandfather but likely purchased in NYC.
In reply to It seems like an odd shape by jobrien8771
I'm thinking along the lines of the Joan as posted on page one from the advert on Lisa's site. The top advert looks to have what could be curved stones the same as the subject watch.
The case is 14Kt White Gold Filled, which is standard for this period.
I'm tentative 1932 Bulova Joan.