Karl Müller with His Comrades during Balkanfeldzug

Oberfeldwebel Karl Müller (at rear, standing with arm raised high) relaxes with other aircrew of 1.Staffel / I.Gruppe / Kampfgeschwader 2 (KG 2) during a stopover at Bucharest during the Balkan Campaign in the spring of 1941. Müller was awarded the Ritterkreuz des Eisernen Kreuzes on 15th October 1942.

Source :
https://www.ebay.de/b/Militaria-Fotos-1918-1945/15504/bn_16578829