Interesting album with color photos from a unit of Flak and Luftwaffe ground unit stationed in the Balkans area. The exact date is unknown, but the year is 1941 and 1942.
Source :
http://www.historicalwarmilitariaforum.com/topic/10759-color-photos-of-a-flak-and-ground-troops-unit-in-the-balkans/?tab=comments#comment-68553
http://www.pixpast.com/index.php?str=138&category=europe-west&flow=1