The silver one shilling coin was made in Boston in 1652, and is one of about 40 known to still exist, a Rhode Island coin expert says
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Buying and Selling Rare Coins at Northeast Numismatics
$20 Pure Silver Coin – Commemorating Black History: Amber Valley
Counterfeit diagnostics
The Numismatic Collector's Series Sale by Spink and Son - Issuu
English silver coin dated at more than 500 years old discovered at
Exonumia Coin News
Daniel Frank Sedwick, LLC Treasure: World, U.S. Coin and Paper
Rare coin made in Colonial New England could fetch $300,000