Thanks to all who are responding.
I'm excited to hear what a 'non-conforming' would mean.
Do I get thrown out of the club for owning a 'Bitza'? :(
I'm fairly confident myself that the case is a '38 Chancellor. The yellow gold plate was not available as far as I can tell on earlier models (edit: wrong it seems) and I had some early concerns that it had been plated after-market. Also the crown looks more consistent (edit: wrong - I was thinking of one of the images on here which has a cabochon, but it seems that one is the exception)
The movement seems to me to be an early 324 ebauche 17J, I say early because I'm given to understand that the later ebauches wouldn't have had the FHF patterning and logo. The arrow on the bridge would indicate 1937. It would be interesting to have some idea which Bulova models from 1937ish would have had a 17J 10AE in them.