American Innovation 2021 $1 Coin Proof Set - US Mint
File:Indian Re 1coin 1992 common version reverse.png - Wikimedia Commons
1 Coin | The Royal Mint
Everything you need to know about the launch of the 12-sided £1 coin
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Buffalo Nickel (Fine condition) 1 coin - Currency and Coin
New £1 coin has a secret feature — and everyone is baffled by it - MarketWatch
New £1 coin to be rolled out overseas - BBC News
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File:Indian Re 1coin 1992 common version obverse.png - Wikimedia Commons
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UK introduces super secure new £1 coin
1 Coin | The Royal Mint
New £1 coin gets even | plus.maths.org
