Bimetallism Bimetallism Cheque Cheque Coin Collecting Coin Collecting Currency Currency Denomination (currency) Denomination (currency) Dollar Dollar Dollar Sign Dollar Sign Ducat Ducat Electrum Electrum Face Value Face Value Gold Medal Gold Medal Heller (money) Heller (money) Metal Metal Metallurgy Metallurgy Mill (currency) Mill (currency) Mint (coin) Mint (coin) Numismatics Numismatics Obolus Obolus Pound Sterling Pound Sterling Ruble Ruble Seigniorage Seigniorage Shilling Shilling Siliqua Siliqua Stater Stater