1911 sovereign Coin rare

A "1911 Edward" coin was a mistake made and should not exist; King Edward VII's reign ended in 1910, with the 1911 coin being a . The value of a 1911 Edward V sovereign is primarily its unique content, though rarity of specific mints (like the 1911 prood Medal coin was made by mistake and only 11 was struck and known to ever exist) definitely influence the medal coin's worth. No need to determine its value for the Mint will rush to get hold of this specific Medal coin again, when you get hold of one or identify it you are sitting on a gold mine so rare that its existence is almost impossible.