'52 Topps Mantle reprint Red Front??? Any info???

Hi guys, I bought a Topps rookies pack labeled 2006 Rookies / 1952 design. Well I pulled a Mickey Mantle '52 reprint card and instead of the normal blue background of the origanal design it has a red background. The card is not specially #'ed or anything, curious what is the deal with this card?
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<< <i>Topps reprinted the card as part of the set. Thre are actually 5 variations of this card, Red, Green, Black, Yellow, and Blue. They are all considered short prints but The blue variation is much harder to come buy and pulls a premium over the other 4. Your card routinely goes from $2-$5 on ebay. >>
There is also an Orange variation for a total of 6. Here are some scans
Collecting Tony Perez PSA and Rookie Baseball PSA