Excellent original condition curved case watch shows very little wear. A tiny bit of wear on case back corners, but back retains it's satin finish. Note the visible groove in the crown. 1938 case date and 1937 dated movement. Mounted on a period correct replacement (?) band as received and keeping perfect time.
1938 President?
I was focused on the jewel count, but now after digging deeper, I don't think it's a President. President looks to have had another "step" on the sides under the engraving. The ads are confusing on engraving and lug shape apparently due to artistic license.
Minute Man is certainly a consideration. I find this 1937 ad that looks to name it Minute Man "E"? Like this one
In reply to I was focused on the jewel… by neetstuf-4-u
UPDATE: This one wasn't making sense as the overall condition, movement and case dates are only a year apart, so a movement swap seemed unlikely. I took it apart again and examined movement with a higher magnification, cleaned off a little crud and it's a 17 jewel movement, NOT 21. My bad......I guess I saw what I wanted to see as opposed to what was there. Updated the root info above from 21 to 17.
With a 17J this is more likely than not a Minute Man, Good call Plains! So, is it variant "E"?