"8" for "S" in Red Cross overprint part 2

One of our readers in Canada has sent me these scans which show what looks like a "8" in place of "S" in CENTS. This is a follow on from the original post in June 2011 which one can see again by clicking the link here.

This is the 3 cents stamp of the set. Mine was the 8c stamp of which I have two possible copies.