Watch List notes:

MEXICO. Mint Error -- Muled With Peso Obverse -- 20 Centavos, 1973-Mo. Mexico City Mint. NGC MS-67 Red Brown.

KM-441. Though not as breathtakingly obvious as some other Mexican mint errors, this piece has been designated by NGC as being muled with the obverse from a contemporary Peso. It is hard to determine with certainty given the closeness of these dies, but given that far stranger products have emerged from the Mexico City Mint, it is perhaps likelier than not to be a mule. Whatever the case, this example demonstrates strong mint red and Superb Gem preservation, making it fully charming.

Estimate: $100 - $200