garryg Saw your post on vintageccm and I tend to agree with the Balloon Tire ID as an option, since it did have chrome rims and a double stay fender, plus the frame is indicated to be "longer and wider" which yours appears to be; but in the 1938 catalog that model still had a Triplex (cotterless) crank. I can't find a 1939 catalog to see if they went one piece in 1939.
Here's a catalog reference for you:
