In reply to I have 68 watches of the… by Alex
Sorry maybe my question wasn't clear enough. How many ladies' models from 1927 and 1928 share this case shape?
We have seen time and time again watches in the flesh that don't match the advert, yet we are still happy to ID them accordingly. We know that both newspaper adverts and official Bulova advertisements don't always match the case engraving variants we see in the wild. There are numerous examples I can give.
Without any indication to the contrary, I think we can be a bit more forgiving when a watch engraving doesn't perfect match the adverts, which as we know often used the same print block across the years.
For now, my belief is that this watch is the Debutante and until we find an advert to the contrary I suggest we ID as such. Although I suspect we'll never find a matching advert showing this exact engraving.
From your 68 examples it sounds like you have 4 (or more) possible engraving variations, yet we have only ever seen 2 model names. Could that not suggest one of the known models had engraving variants? Is that not possible?