The Flak 18 under Bf 110 used ErprKdo 25, II./ZG76, Panzerjaegerstaffel ZG 1, as far as I know.
As far as I recall, ErprKdo 25 had the white cline of 1/3 of the prop hub on black background.
II/ZG 76 had the top of the prop hub in Staffel color, the rest black. So I assume here on 4. Staffel ZG 76. Also the number on nose supports my assumption. ErprKdo 25 had marking of their a/c in LETTERS, ZG 76 changed from letters to NUMBERS in January 1944. So this would assign this photo to spring 1944 (January - March 1944).
But this is just my explanation.
Anyway, would it be possible to send me via email the better resolution version of this photo ?
THANKS!
regards
Peter