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Message:: [QUOTE="jlblonde, post: 1536499, member: 32000"]5 Centavos This 5 Centavos issue is kinda bizarre. No provision was made for striking this issue. So the 1954 year is an unofficial issue making it a highly prized coin. When the mistake was discovered, they were pulled from circulation and were replaced by the larger bronze coins of the previous issue type (see post above). Official minting began in 1955 and ended in 1969. There are approximately 6 different tones, but only 3 are recognized by general collectors. It is made of brass, but the company or mint (not sure who) that supplied the flan/planchet did not keep the percentages of metals consistent. The last coin looks more bronze than brass, but it is still regarded as a brass issue. Mexico - 5 Centavos - 1961 Mo - KM #426 - Brass, 4.0g, 20.5mm - Light Toning[ATTACH]204280.vB[/ATTACH] ------------------------------------------------------------------------------------- Mexico - 5 Centavos - 1961 Mo - KM #426 - Brass, 4.0g, 20.5mm - Dark Toning[ATTACH]204281.vB[/ATTACH] ------------------------------------------------------------------------------------- Mexico - 5 Centavos - 1965 Mo - KM #426 - Brass, 4.0g, 20.5mm - Bronze Toning[ATTACH]204282.vB[/ATTACH] True content for all the above: .850 copper, .150 zinc. This is debatable considering the different toning above which is not an environmental effect but a manufacture defect.[/QUOTE]