 Six sets of Golden Oak Leaves were manufactured, each consisting of an A-piece, made of 18 Carat gold with 58 real diamonds and a B-piece, made of 14 Carat with 68 real sapphires.One of these sets was presented to Hans-Ulrich Rudel on 1 January 1945, the remaining five sets were taken to Schloss Klessheim, where they were taken by the US forces.To qualify for the Knight's Cross, a soldier had to already hold the 1939 Iron Cross First Class, though the Iron Cross First Class was awarded concurrently with the Knight's Cross in some cases.