Udet's early Fokker D.VII (OAW) 2076/18.
I have had some recent inquiries (5) about Oblt. E. Udet's reserve and later main aircraft Fok. D.VII (OAW) 2076/18. The following is how I see it.
The first Fokker D.VII Udet got was an early Schwerin built machine that had the fuselage painted red. The elevators had the words "Du doch Nicht!!" in white and the top wing painted a candy stripe red and white. (Lets refer to this one as DDN) One historian believed that Jasta 4 had been re-equipped with the early Fok. D.VII (Schwerin built) between June 15 - 23 1918.
On or about June 16 - 20, 1918 Jasta 11 and other JG I staffelfürhers all were assigned 22 new Fokker D.VII aircraft from OAW (most with BMW IIIa motors). Udet was assigned 2063/18 and 2076/18. Since he since he already had one machine (DDN) he gave 2063/18 to Ltn. H. Dreckmann and Udet kept 2076/18. From all images available the early series Fok. D.VII had 4 color lozenge on all surfaces. The rudder and stabilizer were over painted white. The Jasta 4 fuselages had the four longerons painted with with narrow white, black, white stripes nose to tail.
From the tally of Udet's score he flew this machine the afternoon after DDN was brought down. Udet flew over the crash site noting the carcass of DDN that he had escaped from that morning - June 29, 1918. He also claimed his 36 - 40th victories while being assigned this 2076/18. Attached are Jasta 4 images that corroborate the above information. I have cross dimensions to call on as well but I also suggest you see "Von Richthofen's Flying Circus" by Greg VanWyngarden through Albatros Pub.