Past President of Northern Valley Coin Club (NJ), past Secretary of C4. Author of articles in three of the American Numismatic Society's Coinage of the Americas Conference proceedings (U.S. Colonials, Counterfeits and West Indies), and numerous Colonial Newsletter and Penny-Wise publications. Sold colonial collection via Stack's (2008 Americana sale) and Coin Galleries (sales in 2008-2009). Currently (2018) MNA Member and specializing in Spanish American coinage, Mexican War of Independence coinage, world contemporary counterfeits, paper money and error coins. Author of Forgotten Coins of the North American Colonies - 25th Anniversary and co-author/contributor to the Gurney/Nichols/Lorenzo (GNL) Counterfeit Portrait Eight Reales book.
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A series of in-depth studies on counterfeits and forgeries of colonial-era coins, including Blacksmith Tokens, Two Reales, contemporary counterfeits, modern forgeries, and contemporary counterfeit English & Irish halfpence and farthings.
Note: This is an in-copyright publication, full view is not available on NNP. "Snippet" extracts will appear in NNP search results. The work is available via Amazon (as of 2/2018) at https://www.amazon.com/Forgotten-Coins-North-American-Colonies/dp/1981898042.
The 1821 Zacatecas Eight Reale Non-Homogenous Surface Puzzle – Cleaned or the Result of an Improper Mercury Amalgamation Manufacturing Process?
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.