http://keymancollectibles.com/baseba...schecklist.htm
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The 1962 Pittsburgh Exhibits (AKA 1962 Playing Cards - Supers) baseball card set consists of 82 cards that measure 3 1/4" x 5 1/4" Designed as an oversized deck of playing cards there are 28 Clubs, 19 spades, 21 Hearts and 14 Diamonds. Most of the card "Denominations" can be found with more than one player, some players appear multiple times, and 3, 4, and 5 of Diamonds have yet to be identified or may be subjects not related to baseball, and do not appear on the checklist.
Because there is no date or credit line to the manufacture the date of issue, 1962, has been estimated. Player content suggest Pittsburgh was the center of distribution and collectors report having received the cards in penny arcades vending machines at Kennywood Amusement Park or near there. It has also been reported that the cards were given over the counter as prizes for getting a winning gumball from a machine.
the cards are printed in black & white or red, black & white and they are usually blank backed but examples have been found with apparent prize references printed on the back.
The cards have been named "Exhibits" because of there similarity to the vending machine cards issued by the Exhibit Supply Company of Chicago. PSA grades the cards and labels them as "1962 Playing Cards - Supers". Besides the players listed on the checklist the set contained TV and movie cowboys, Rock-n-Roll stars, Boxers, Wrestlers, and cartoon characters.