This book includes an estimated rarity rating for each date and for each die marriage within that date. Rarity ratings are described by the Sheldon Rarity Scale, depicted in the table below.
A rarity may be listed as “unconfirmed” if we have not found conclusive evidence that a date or die marriage exists. An example is the 1873-S, which has a mintage record but no known examples. We also use this listing for die marriages which have been documented in previously published references but which we’ve been unable to confirm, either by direct examination or by reviewing auction records. Examples include our 1852 die marriages OC-2 and OC-P4.
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