Identifying a rare die variety is not a matter of having a keen eye, for rare die varieties can be detected by utilising a number of different reference catalogues, physical measurement and magnification. Consulting Variety Catalogues 1) Match the coin against a recognised and authoritative reference catalogue of die varieties. For example, all milled British coins are listed in the English Silver Coinage (ESC) and every documented die variety is included with a detailed description. The person identifying the variety must know which reference system they are using before they…
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