Question for the Blogosphere

Most collectors know that the 1990 Upper Deck Reggie Jackson autographed cards were the first certified autographed cards inserted into packs. Most collectors know that the first baseball jersey cards were produced by Upper Deck in 1997. My question for you is, when/what was the first redemption card? I have one from 1999 SP Signature Edition of Ruben Mateo. I know the card is not worth much on its own, but if it's one of the first redemption cards then I'd keep it as part of baseball card history. If anyone knows of any earlier redemption cards please let me know. Thanks!

I know it's a little hard to read on the scan so here is a transcript.

Dear Collector

       Congratulations! You have received a "Redemption" card for an authentic autographed trading card from the 1999 MLB SP Signature Edition set.

        To receive your card, simply send this card along with your name, address, (No PO Boxes) and telephone number to: The Upper Deck Company Attn: Redemption Manager, 1999 MLB SP Signature Edition Offer, 6909 Sea Otter Place, Carlsbad, CA 92008. For insured delivery, please enclose a check or money order for $4.00 (US funds).

        Upper Deck nor any of its agencies are responsible for lost, late, damaged, misdirected, incomplete, illegible, or postage due mail. This redemption card will not be returned. your redemption card must be postmarked by 5/12/00 and received by 5/19/00. Please allow 4-6 weeks for delivery.