I think this watch may indeed be an Executive. I have been down the rabbit hole, and here is my thinking on early men's models. Please bear with me. After reviewing Executive and President early models, both were offered in solid gold and green or white plate. The database of submitted watches doesn't include solid gold versions of either. This President shows ads from 1925 and 1926 depicting President with engraving combination we have yet to identify. The case side pattern in ads appears to be a match to upper and lower face "scallops"; and upper and lower face horizontal a match to subject watch and Geoff's President verticals. Are these ads showing the solid gold case, first intent by Bulova or artistic license?
This would seem to provide evidence of the previously discussed theory that the first early men's watches varied engraving may in some cases be an indication of case composition. Solid, and plated of the same color had different engraving patterns? Green gold would not be engraved the same as solid or white, with this differentiation disappearing with the green gold option, and all plated (yellow and white) were then the same design?
It's also possible the case stamping team played fast and loose setting up the dies early on. :o)
Just thinking out loud.
1925 Executive (variant)