A TWENTY pence coin minted in error without a date has sold for £120 at a Colwyn Bay action.
The coin, found by a Colwyn Bay pensioner among the small change in her purse, was one of tens of thousands of the faulty coins struck at the Royal Mint in Cardiff.
A public competition was launched last year to redesign the coins and Matthew Dent, 26, a graphic designer from Bangor, North Wales, emerged the winner from a field of 4,000 entrants.
Mr Dent's designs dictated that the date should be moved from the tails to the heads side of the new coins.
But tens of thousands of the faulty coins were struck at the Royal Mint at Llantrisant when the design for the new tails side was accidentally paired with the old heads side, resulting in coins being struck with no date at all.
The coin sold for £120 at Rogers Jones auctioneers last week.
The faulty coins remain legal tender but their value as collectors' items has rocketed among numismatists.