just purchased from the USA i think its a webster model but not sure.
In any case watch with a movement 10AN are from the period of the thirties, It makes me feel like a movement and dial originated from model Ambassador, but Ambassador has engraved stepped case, I do not see match the shape of the case with the available models or adverts either from the thirtieth neither fortieth period, most similar cases are engraved
American Clipper ad (B) 
No, the clipper models have a six sided crystal. This one is definately rectangular.
The more i search the more it looks like a 1935/6 Senator, stepped sides without engraving.
In reply to The more i search the more it by dougindoors1957
do you have an example? advert or similar watches
I saw a similar case for Senator from 1935, but attached advert has a completely different shape of case and, moreover, with a movement of 15 jewels, I think that this classification are wrong and are not Senator as well as those
The more i search the more it looks like a 1935/6 Senator, stepped sides without engraving.
The lugs are different from the Senator.
On the Senator for 1934, there is a horizontal line even with the case edge that runs across the lugs.
These lugs flow smoothly from the case without the visual break.
Base on this advert that Lisa once found I'd say it's a good match for a 1934 Bulova 'Lone Eagle'. We don't have any other adverts I think confirming this, so it may be a misprint, but for now its' what we have. The case style is certainly that of the LE, just has a variant dial.
A variant of the the fourth series.
I would say that it is a perfect match for this ad.
Dial matches, jewel count and the case geometry all match as well.
Good find Stephen, agree 1934 LE