Penny sells for £72,000 and is now the most expensive copper coin in the world, The Independent

Coin which is one of four in existence sold at auction after fierce battle between two bidders

With the future of 1p and 2p coins under scrutiny, is your small change worth a fortune? - Which? News

Isle Of Man Penny KM 9.1 Prices & Values

British Honduran 1 cent coin, Currency Wiki

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Great Britain Penny KM 794.1 Prices & Values

What are the most expensive coins? - Quora

Design: Showcases a 1965 big penny! Condition: Average AU Diameter: 39mm

Canada: Sudbury 1965 The Big Penny Copper Medallion

Top 15 Most Valuable Indian Head Penny Worth Money

RCMR - 2022 #1 January/February by Professional Coin Grading Service (PCGS) Market Report - Issuu

How Much Are Old Pennies Worth?