MEXICO. 20th Century Copper Centavo to 20 Centavos Group (6 Pieces), 1906-35. All NGC or PCGS Certified.A collectible group of copper issues that includes Centavos (4), a 10 Centavos (1) and a 20 Centavos. The 20 Centavos piece (KM-437) is the first year of a scarce two year type and has a emStandard Catalog of World Coins/em value of $155 in XF-40 condition and $650 in MS-60 condition.