Great Wars of the Twentieth Century TWELVE Coin Boxed Set COA & History Inc. A retrospective collection featuring coins from countries involved in the three greatest wars of the 20th century. World War I: silver coin of Austria-Hungary, US penny- World War II, Europe: Italian 1 lira, Nazi coin- Cold War: USSR coin, East German coin. Note: Coins years may vary from the picture coins. Please see all the pictures for details.