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<p>[QUOTE="sonlarson, post: 1960076, member: 15488"]In 1951 Tin was omitted from the alloy</p><p><br /></p><p>28.5mm, 10g, .950 Copper, .050 Zinc</p><p><br /></p><p>[ATTACH=full]345612[/ATTACH] </p><p><br /></p><p>Redesigned Eagle 1955-1971</p><p><br /></p><p>In 1955 the eagle was resigned and both obverse eagle were minted that year. The reverse was identical to previous series.</p><p><br /></p><p>[ATTACH=full]345613[/ATTACH] </p><p><br /></p><p>Redesigned eagle 1971-1974</p><p><br /></p><p>The Eagle was again redesigned for 1971</p><p><br /></p><p>[ATTACH=full]345614[/ATTACH] </p><p><br /></p><p>Copper-Nickel Coinage 1974-1983</p><p><br /></p><p>The rising cost of Copper resulted in the end of the large Bronze Coins.</p><p>The smaller Copper-Nickel coin bears the portrait of President Francisco I. Madero</p><p><br /></p><p>20mm, 3g, .750 Copper, .250 Nickel</p><p><br /></p><p>[ATTACH=full]345615[/ATTACH] </p><p><br /></p><p>Bronze Coinage 1983-1984</p><p><br /></p><p>As the Peso continued to depreciate the 20 Centavos was struck in Bronze. The reverse featured a sculptured indian face from the Olmec Culture.</p><p><br /></p><p>20mm, 3.04g, .850 Copper, .050 Zinc</p><p><br /></p><p>[ATTACH=full]345616[/ATTACH][/QUOTE]</p><p><br /></p>
[QUOTE="sonlarson, post: 1960076, member: 15488"]In 1951 Tin was omitted from the alloy 28.5mm, 10g, .950 Copper, .050 Zinc [ATTACH=full]345612[/ATTACH] Redesigned Eagle 1955-1971 In 1955 the eagle was resigned and both obverse eagle were minted that year. The reverse was identical to previous series. [ATTACH=full]345613[/ATTACH] Redesigned eagle 1971-1974 The Eagle was again redesigned for 1971 [ATTACH=full]345614[/ATTACH] Copper-Nickel Coinage 1974-1983 The rising cost of Copper resulted in the end of the large Bronze Coins. The smaller Copper-Nickel coin bears the portrait of President Francisco I. Madero 20mm, 3g, .750 Copper, .250 Nickel [ATTACH=full]345615[/ATTACH] Bronze Coinage 1983-1984 As the Peso continued to depreciate the 20 Centavos was struck in Bronze. The reverse featured a sculptured indian face from the Olmec Culture. 20mm, 3.04g, .850 Copper, .050 Zinc [ATTACH=full]345616[/ATTACH][/QUOTE]
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Estados Unidos Mexicanos- A History of Modern Coinage
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