Posted By:
Rhett YeakleyIt doesn't look like there is too much information known for the "EKC" Sello back. The known example they have is 1941, but that doesn't necessarily mean that is the definitive date. The "EKC" English back is known from 1930-50 so Yours could still be in that range as well. Prabably more like 1940-50 if I had to make a guess.
-Rhett