Winged Liberty Dime - Mercury Dime What is a Mercury Dime/Winged Liberty Dime? - The Mercury Dime or Winged Liberty Dime is an American 10 cent coin minted by the US Mint between 1916 and 1945. The head is that of Liberty, wearing a cap with wings on it, but as it looks like Mercury, the Roman messenger of the Gods, it is better known as a Mercury Dime.