Bidspirit auction | 2 Autographs oak leaf/sword recipient

2 Autographs oak leaf/sword recipient - 2 Autographs Oak Leaves/Swords Bearers, both OU on photo postcard, Lieutenant Commander ”Otto von Bülow” (1911-2006), Knight's Cross with Oak Leaves; Corvette Captain Otto Kretschmer (1912-1998), Knight's Cross with Oak Leaves and Swords, 1 OU not clearly recognizable/black background, both postcards wavy