Unknown serial - Jasta Boelcke - Ltn. d. R. Wilhelm Prien- June 1917Status: Partially confirmed by photos
Prien taken over Kempf's plane and modified its "camouflage"
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 49