It look natural to me. I've seen that type toning many times on silver coins.
Retired dealer and avid collector of U.S. type coins, 19th century presidential campaign medalets and selected medals. In recent years I have been working on a set of British coins - at least one coin from each king or queen who issued pieces that are collectible. I am also collecting at least one coin for each Roman emperor from Julius Caesar to ... ?
Comments
bob
“We are only their care-takers,” he posed, “if we take good care of them, then centuries from now they may still be here … ”
Todd - BHNC #242
Coin Rarities Online
IMO, cleaned and retoned in aforementioned wallet/leather.
Well, just Love coins, period.
jom
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Complete US-PHIL Coins for Sale, Circulation Strikes 1903-1945