An uncommon 50 pence piece from the Royal Mint fetched over four hundred times its monetary worth at auction, with several thousand thought to still exist in everyday use.

The collectable Blue Peter 50p, produced to commemorate the London 2012 Olympic Games, recently reached £220 on the online marketplace eBay after drawing ten offers. A separate specimen of this piece previously commanded up to £286.

Created by Florence Jackson, who triumphed in a Blue Peter contest, the coin displays a high jumper and initially appeared in 2009 prior to the London Games.

Though approximately twenty thousand were struck, they were never formally distributed into general circulation. However, enthusiasts maintain numerous pieces have since entered regular circulation, suggesting some may remain undetected among change throughout Britain.

These pieces originally sold for £1.09, yet their scarcity and Olympic association have substantially enhanced their appeal to collectors.

Specialists advise anyone holding onto older 50p coins to scrutinise their designs closely, as uncommon variations such as the Blue Peter coin can carry considerably more value than their printed denomination.

The 50 pence piece has become the most prized and collected denomination in Britain, with many collectable designs appearing on its seven-sided form.

Its 27.5mm diameter makes it the largest of any British coin, and provides room for elaborate imagery. It has frequently been used to honour major occasions throughout the past fifty years of British history.

The scarcest coins typically hold the highest worth, with the mintage figure being the core attraction for collectors.

Beyond the design, other elements that increase a coin’s worth include its state of preservation and whether it bears any mistake in its striking.

The method of sale can also influence value – while some collectors will bid substantial sums on eBay or at auction, others prefer more dependable valuations through coin dealers.

The Royal Mint’s top 10 most valuable 50p coins, their production years and mintage figures:

Atlantic Salmon (2023), 200,000

Kew Gardens (2009), 210,000

Olympic Wrestling (2011), 1,129,500

Olympic Football (2011), 1,161,500

Olympic Judo (2011), 1,161,500

Olympic Triathlon (2011), 1,163,500

Peter Rabbit (2018), 1,400,000

Flopsy Bunny (2018), 1,400,000

Olympic Tennis (2011), 1,454,000

Olympic Goalball (2011), 1,615,500