I don't know why it wouldn't be authentic. I've never seen a forged aluminum proof, and if someone was going to make a forgery it would be of Mantle card or something on that order, not a half done add like this. Also aluminum of Topps products exist, most coming from the Topps archives.
That's why I said I was confident it was genuine.
I had a few aluminum prrofs for period Topps football cards from the 1989 Topps Archive auction, and they were similar. Black and white on thin aluminum and with incomplete graphics.
Last edited by drc; 06-12-2011 at 11:38 AM.
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