I know that set as the Gridiron Greats blotters from 1939, although sometimes the artwork is used to create other office products like this calendar which has a 1943 date
I do have these two
Here are two other Grange examples (which I don't have) and one has a 1941 calendar printed on it
I see that Beckett has a page on these but since I'm not a member I can't see the prices
http://www.beckett.com/football/1939...reats-blotters