Coin World Sneak Peak on Unique Machine Doubling Examples

coin machine doubling coin world

An unusual case of machine doubling What is called “machine doubling” is a fairly common occurrence on coins and is a manifestation of press instability, writes Mike Diamond in his “Collectors’ Clearinghouse” column. The featured coin this week displays an unusual form of machine doubling. “A complex example of bifacial push doubling is seen here […]

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