Posted By:
Keith O'LearyI don't see any Turkey Red backs listed, but the reprints can be identified by looking for 2 small starbursts on the reverse. They are inside the 2 bottom corners of the framing lines that run around the perimeter of the card. If the adv backs exist, I'm sure the same would hold true. If you blow up one of Mike's reverse scans they can clearly be seen.
http://www.mikewheatcards.com/reproductions.htm
Keith