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<p>[QUOTE=&quot;giorgio11, post: 1940657, member: 17094&quot;]A die marriage or die pair is the specific combination of obverse and reverse that was used to strike the particular variety (Overton varieties in this case). For example all of the 1815/2 half dollars are O-101 because only the single obverse bearing the 1815/2 date was used in combination with a single reverse to strike all of the known examples. For other dates, 1828 for example, there were 13 different obverse dies and 17 different reverse dies used to strike a total of 23 different die marriages. Sometimes one obverse or reverse die can be shared among several different combinations of the other side. The whole of early U.S. numismatics is based on similar principles of identifying different die marriages and varieties, and there are specialized reference books for every U.S. coin series to help numismatists identify those differences and classify them according to rarity. For Bust halves one such reference is Al Overton&#039;s (Don Parsley is editor) <i>United States Early Half Dollar Die Varieties 1794-1836.</i> Another useful reference is <i>The Ultimate Guide To Attributing Bust Half Dollars </i>by Glenn R. Peterson, M.D.</p><p><br /></p><p>Best Regards,</p><p><br /></p><p>George</p><p><br /></p><p>Best Regards,</p><p><br /></p><p>George[/QUOTE]</p><p><br /></p>

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