MEXICO. Cob Real, ND (1542-55)-M L. Mexico City Mint. Carlos & Johanna. NGC AU Details--Polished. KM-9; Cal-72. Weight: 3.26 gms. Late Series. While this Real has been polished to brilliance, its well-centered and bold strike remains enticing. An appealing piece of early Mexican silver without the flatness and die shift which often afflict Reales of this period. From the David Sterling Collection.