I have been looking to get one of these for years! Solid silver early early men's Bulova.
.925 and a standing lion Hallmark.
There are a three 1924 ads showing Stirling silver options for men's watches with this dial.
For a 1924 watch I think we have a "39744"
This guy has a hinged case.
Yeah the more I look at this the more I'm no longer sure. Now that we have another example to compare with, there are some obvious differences which wear would not account for....i.e. the angle of the outter lug line.
The subject watch seems to maintain a straight line from tip to tip, were as the other example and the advert both show a definite angle.
I think I have to back-track and agree with you Bob...this may just be a model we have yet to come across in an advert.