Case measures 37mm lug to lug x 26.5mm non inclusive of the Crown using Calipers. Butler finish Dial shows luminous Arabic Numerals, Bulova signature and tracks are printed in Black. Hour and Minute Hands are 'Cathedral' style and a Modern style Seconds Hand appears on a sub Dial partially obscuring the 6. A Dust shield and Gold retaining ring appears over the Movement. Movement block is Gold. Hinged Caseback is stamped as shown. Vintage display ad Dated 1930.
Crystal size is my guess. I have two models that look like the Governor but take different crystals. The cases are the same size.
Specifically, I have the Governor as
Crystal - 24.6mm x 22.4mm
Other model, possibly the Lafayette:
Crystal - 24.6mm x 19.7mm
The one I've been thinking may be the Lafayette is yellow gold like the subject watch.
In reply to Crystal size is my guess. I by NOVA
The cases are the same size, but the possible Lafayette has a thicker bezel, allowing it to take a narrower crystal.
I have three white gold models that take the wider crystal. I believe them to be Governors.
Isn't the Governor one of the models that has been ID'd only via the Price Guide?
for what it's worth.
As the Watch Owner I've always questioned a 'GOVERNOR' ID on this Case - the bezel simply doesn't quite match.
IMO, the new ad for the 'LAFAYETTE' more closely resembles this bezel and although details of Case color are missing the Jewel Count, Dial and Hands are a match which should be worthy of a 2 Star 'tentative' ID.
2c
24.7 x 19.6
Although the Watches shown above appear different the Case dimensions are the same (Optical illusion caused by the Camera angle at close range)
Crystal dimensions are also the same as noted above with the Silver Watch measuring on the big side of 19.6mm wide - which could be accounted for by manufacturing variation.
The Dial in the Silver Case is marked Swiss and the Numerals are slightly different than on the Gold.