Ultra-rare ballpoint pen signature of the MAD cartoonist who created Spy vs. Spy, one of the magazine's most iconic creations, on a 1991 postal stationery card, printed up with his address and image of White Spy and Black spy engaged in their usual highjinks.  On the back, he has affixed to portions of strip he was planning out in pencil, showing the White spy engaged in a bit of espionage.  In very good condition.  For those who collect E.C. Comics and Mad Magazine artists' autographs, that of brilliant Antonio Prohias is one of the most elusive and desirable in any format.  This is just the third example we have encountered in three decades. 

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