Hoffmann Photo Postcard (Nr. 1522) of Knight’s Cross Holder Hermann-Friedrich Joppien, who earned the Ritterkreuz mit Eichenlaub on April 21, 1941 (RK on September 16, 1940) as Gruppenkommandeur of I. Gruppe/ Jagdgeschwader 51. He was Killed in Action on August 25, 1941. Joppien claimed 70 enemy aircraft shot down in roughly 270 combat missions: 42 victories over the Western Front, of which 23 were Supermarine Spitfires, the remaining victories were recorded over the Eastern Front. Good condition, minor wear. Postcardsize.