A Birmingham eBay seller has listed the rare uncrowned King 50p coin for £1,025.68. Why is King Charles uncrowned on 50p coins? The first King Charles 50p coins were memorial and entered circulation in December 2022, marking the transition from the late Queen to the King. READ MORE: The 50p coin that could be worth a small fortune after selling for more than £175What is the rarest 50p coin? Seven Olympic 50p coins from the 2012 Olympic Games feature in the Royal Mint’s top 10 most valuable 50p coins.