It's said it was Bf 109G-8 (possible G-6) of 2.(H)/NAGr 12 and flown by Hauptmann Emmerstorfer often.In 1997 David Wadman and Hikoki Publishing company published a book entitled "Aufklarer-Luftwaffe Reconnaissance Aircraft Units- 1935-1945". In the book it's said that the aircraft was painted in Dark Brown, no RLM number but just Dark Brown.
However in "Militaria I Fakty" no. 51/2009, AJAKS book it is considered to be painted with Light Grey irregular strips applied on the fuselage painted with Dark Green overall and wings and tails covered with Dark Green/Black Green at top surfaces.
Anyway it's a very unique camo scheme.