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
ANS Digital Library: Numismatic finds of the Americas
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Group of NGC-certified Massachusetts Coins Realizes Over $2.9
Rare coin made in Colonial New England could fetch $300,000 at UK
Auction Results
RCMR - 2022 #5 September/October by Professional Coin Grading
Colonials Rare Coin Wholesalers, a S.L.Contursi Company
MEETCUER Copy 1795 Liberty&Eagle Silver Plated USA Coins-US