MEXICO, Estados Unidos Mexicanos. 1905-pres. AR Medal (37mm, 25.03 g, 12h). Centennial of the Circulo Mercantil Mutualista de Monterrey. Ciudad de México (Mexico City) mint. Dually dated 1872 and 1972 Mo. 375 ANNIVERSARIO DE LA FUNDACION DE MONTERREY · A DON BENITO JUAREZ ·, cypher on cross pattée / EL RESPETO AL DERECHO AJENO ES LA PAZ, bust of Benito Juarez facing slightly left; 1872/ Mo to left, 1972 to right. Iridescent toning. EF.