A World War II Nazi German Knights Cross or Ritterkreuz, the highest award in the military forces of Nazi Germany. Cross with Oak Leaves, Swords and Diamonds was a higher variation of the order instituted in July 1941. Cast iron cross of patte shape with embossed swastika and date 1939 on the front and date 1813 on the backside referring to the institution of the original Prussian award. Suspension with an oak leaf and crossed swords embellished with diamonds. Second World War Historical Collectables And Relics, Military Insignia, Awards And Medals.