Prince Claus of the Netherlands (1926 - 2002) with his eldest son Willem-Alexander, Prince of Orange, during a family holiday in Lech, Austria, 13th March 1970. (Photo by Keystone/Hulton Archive/Getty Images)
Prince Claus of the Netherlands (1926 - 2002) with his eldest son Willem-Alexander, Prince of Orange, during a family holiday in Lech, Austria, 13th March 1970. (Photo by Keystone/Hulton Archive/Getty Images)