There is a long cross, roses and pellets on the reverse. The coin has been said by numismatists - coin experts - to show the first 'true' portrait of an English King. It was minted at twice the weight of a silver penny and valued at 20 pence, which equates to about £60 in today's money. However, most were melted down after falling out of circulation following Henry III's death, as the weight of gold was worth more than the value of the currency. There are now just seven known surviving examples - the others are in the British Museum in London, the Fitzwilliam Museum in Cambridge, and private collections.