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<p>[QUOTE=&quot;jhinton, post: 1535417, member: 24410&quot;]Every single 1928 20 Centavo is a 1928/7 mule. There was an urgent need for the 20 centavo coins in 1928 but they had not been produced since 1921; therefore there were no dies made. The mint decided to use five centavo dies instead. They just punched an 8 over the 7 of the 1927 die. I do not have any of my books with me or any of my coins so I cannot say for certain where the reverse die came from. It could have been made new or reused from a 1921 or earlier die. To my knowledge I do not think a comprehensive study has ever been attempted on die characteristics of the USPI series except for the 1906-S peso. We may never know the origin of the reverse die used for the 1928 mule.</p><p><br /></p><p>The fact that this coin was an intentional mule verses an unintentional mule does not weigh much in it&#039;s value. It is a key coin due to it&#039;s low mintage. If there had been a full run of 1928 twenty centavo coins produced and only a small percentage were mules (as in the case of the 1918-S five centavo mule) more of the value would be due to that unique circumstance. Unfortunately, (or fortunately for us collectors) the USPI does not carry much recognition or active collector base in the US. Most dealers do not even know (or care) how scarce or rare some of the coins even are. If you look at the 1906-S peso for instance, there are three types (or die pairings) known. The type three, of which I now own a PCGS EF45 certified example of is undoubtedly the rarest of the three (reported so far). But it does not make a difference as the 1906-S peso is such a scarce coin, not many people have the means to collect them by type, even if they wanted too. If they did have the means, it would more than likely take years to assemble the three coins due to the fact that problem free examples do not come to market very often.</p><p><br /></p><p>As far as value, if I had your coins in one of my cases I would charge $45 for the first one and $35 for the second one. If they were problem free coins, I would at least double that. Don&#039;t pay much attention to the published guides on this series, especially on scarce coins of the series.[/QUOTE]</p><p><br /></p>

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