Franck,
Moreover in the book "Defending the Reich" we can see (page 141) the same photo of Kehrle's aircraft (black 7) as the one joined to your post, but more "widely" printed.
Have you cropped the photo before posting?
Apparently Kehrle was leading a "Rotte" (two aircraft formation) with Rudolf Einberger as wingman, during the summer-autumn 1943 period in Leeuwarden. In an amusing manner, both aircraft were adorned with personal emblems showing a hunter. Kehrle's hunter was slim... Einberger's one (on black 8) was portly!
