[sandmountainslim]

I have been seeing several 2015 Leaf Heroes of Baseball and 1951 Batting Champ cards offered on ebay and these cards feature authentic Musial autographs according to the back. My question is how did they get authentic autographs from a fellow who passed away before the cards were made? Did they just cut our strips from previously autographed items and paste them on the cards?
Thinking of buying one of these but puzzled by how they did it.
thanks