Rare 20p coins set to sell for 500 times face value during North East auction
A minting error on a small number of 2008 twenty pence coins has made them highly desirable, with some expected to sell for ...
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Tiny mark on 20p coin makes it worth £97 in huge boost for UK households
A tiny and " unremarkable" error on your 20p coin makes it worth 485 TIMES its face value. One mistake made for the first time in 300 years caused 250,000 "mule ...