Signed photo of Oblt. Erwin Leykauf offered for sale on Ebay here. Leykauf is seen climbing down from his Bf 109 G-4 'Blue 1' of 12./JG 54 some time during April-May 1943 either in northern France or Belgium. Leykauf had been appointed Staffelkapitän in April 1943 and a few months later moved to 11./JG 54 in the newly established IV./JG 54. Leykauf survived the war with 33 confirmed victories, 27 of which were scored over the Russian front. In May 1940, he joined 2./JG 21 and shortly after on May 10, he scored his first victory. I./JG21 was re-designated III./JG 54 and Leykauf was posted to 7. Staffel with whom he flew during the Battle of Britain scoring 4 victories.
Below; Bf 109 G-6 with Gondelwaffen "Blue 12" and 'Blue 1' of 12./JG 54 seen in May 1943. Source: film compiled by Erwin Leykauf via archiv-akh.de.
Film diary of a Jagdstaffel July 1941 - Erwin Leykauf 8./JG 54