Hate to break it to you, but that is a ghost-signed Zimmer. It's signed by his wife, Soot, who signs his fan mail. You can tell the one's Soot signs by the closed "D" in Don. A real Zimmer signed autograph looks like this one, with the open "D". The example below is the certified auto version of your card.
Man-O-Live! I've been nailing down some bargains on eBay recently. 
Hate to break it to you, but that is a ghost-signed Zimmer. It's signed by his wife, Soot, who signs his fan mail. You can tell the one's Soot signs by the closed "D" in Don. A real Zimmer signed autograph looks like this one, with the open "D". The example below is the certified auto version of your card.
ReplyDeletehttp://www.collectingzim.com/cards/04TOPPSATFFAUTO.jpg