MEXICO. Mexico Numismatic Society Historic Coins Series Gold Medal, 1973-Mo. Mexico City Mint. NGC MS-67. Grove-not listed; KMX-256a. Weight: 41.66 gms. Mintage of only 100 pieces. Coins on medals series I # 5. Obverse of a 1772 Charles III 8 Reales in center with legend "CONMEMORATIVA DE LA MONEDA MEXICANA" above, "1772 1821 BUSTO DE 8 REALES" below in two-lines; Reverse: 8 Reales reverse in center with legend "PRIMUM NUMISMA AMERICAE" above, "SOCIEDAD NUMISMATICA DE MEXICO" below. This bright and flashy superb Gem exhibits hard flashy surfaces with frosted devices displaying a pale golden hue. From the Pat Johnson Collection.