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

British Honduran 1 cent coin, Currency Wiki

How Much Are Old Pennies Worth?

Extremely rare coin made for King Edward VIII's short reign sells for record £133K – The Sun

Baldwins 2016 Summer Fixed Price List (full) by A. H. Baldwin & Sons Ltd - Issuu

Most Valuable 1933 Very Rare UK One Penny Coin

How Much Are Old Pennies Worth?

That 2p in your pocket could be worth up to £1,400, The Independent

Isle Of Man Penny KM 5 Prices & Values

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Top 9 Most Expensive Pennies Ever Sold On Auctions - Damia Global Services