Distributed in Puerto Rico, little is known about the aluminum coins that make up this 13-coin set of Latin players. Their sponsor, Esso Oil Co not even mentioned on the coins.  The coins of Tony Perez and Rod Carew are considered more difficult (the Perez coin was redeemable for a tank of gas).  Despite the relative scarcity of Carew and Perez, the key to the set is that of Roberto Clemente.  This example has been graded EX-MT 6 by PSA; eye appeal is extremely strong, the embossed image of Clemente clear and detailed.  One of just 20 examples graded by PSA.