Signature of Luftwaffe KC-OLC Recipient 'Josef Prentl'

In a very nice condition a original signature (backside) on a postwar portrait picture of Josef 'Sepp' Prentl.Major Prentl earned the knight's cross of the Iron Cross on 21 October 1942 as a Chef 2./Flak-Regiment 231 and the oakleaves on 28 April 1945 as Kommandeur Flak-Regiment 116 (mot.)