This is a really early 21 Jewel guys in the 10AE series. At first I thought it was the Ben Hur but then saw that the Ben Hur is etched only.
So this smooth bezel Ben Hur is actually the Calhoun I think.
Lugs are sort of cool as this watch looks like a Banker/Ranger with a sort of twist on the bezel right before the lugs.
The "Calhoun" ad is from 1938 and it's in the database.