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The 1821 Zacatecas Eight Reale Non-Homogenous Surface Puzzle – Cleaned or the Result of an Improper Mercury Amalgamation Manufacturing Process?

(2020)


Book Summary

Lorenzo argues that surface issues on 1821 Zacatecas eight reale coins are caused by imperfect manufacturing and should not be considered the result of cleaning. Coin were examined via stereo microscope in addition to SEM/EDS testing.
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