Whatever ate away at the coin was more aggressive towards copper than it was the copper-nickel.
Jesse C. Kraft, Ph.D.
Resolute Americana Curator of American Numismatics
American Numismatic Society
New York City
Member of the American Numismatic Association (ANA), British Numismatic Society (BNS), New York Numismatic Club (NYNC), Early American Copper (EAC), the Colonial Coin Collectors Club (C4), U.S. Mexican Numismatic Association (USMNA), Liberty Seated Collectors Club (LSCC), Token and Medal Society (TAMS), and life member of the Atlantic County Numismatic Society (ACNS). Become a member of the American Numismatic Society!
It does appear to have been either acid etched or in an acidic environment (i.e. acidic soil) for a period of time...Definitely etched the copper...PMD. Cheers, RickO
Answers
Acid bath......
Whatever ate away at the coin was more aggressive towards copper than it was the copper-nickel.
Jesse C. Kraft, Ph.D.
Resolute Americana Curator of American Numismatics
American Numismatic Society
New York City
Member of the American Numismatic Association (ANA), British Numismatic Society (BNS), New York Numismatic Club (NYNC), Early American Copper (EAC), the Colonial Coin Collectors Club (C4), U.S. Mexican Numismatic Association (USMNA), Liberty Seated Collectors Club (LSCC), Token and Medal Society (TAMS), and life member of the Atlantic County Numismatic Society (ACNS).
Become a member of the American Numismatic Society!
It does appear to have been either acid etched or in an acidic environment (i.e. acidic soil) for a period of time...Definitely etched the copper...PMD. Cheers, RickO
Likely buried for a while (at the beach, in the woods, wherever...) and this is the result.
In honor of the memory of Cpl. Michael E. Thompson