Unknown serial - Jasta Boelcke - Ltn. d. R. Fritz Kempf - June 1917
Status: Confirmed by photos
Additional drag cables were installed between the upper wing and nose. Anemometer was installed on left strut and rear view mirror on the top wing above cockpit.
Jagdstaffel 2 "Boelcke", Osprey Publishing, pg 40 and 48
Albatros Aces of WWI, part I, Osprey Publishing, pg 14