Thanks Ross,
This is at least the confirmation of it !
On later occasions I seriously suspect a certain MvR and Jasta 11 to have done the job. There are after all the pictures of him taken in June 1917 at Kagohl III, which are also to be found in Greg's great book Richthofen's Circus: Jagdgeschwader Nr 1.
However the question remains, 'who did it' the first time on the 5th June ?
Best from Johan