You have chosen a question that despite claims made to the contrary, No One can really 100% prove. It was either an Early Fokker built DVII, or an Early OAW built DVII. There are arguments for both. This was the controversial Striped upper wing bird. I went with OAW but the choice is yours!
RAGIII
PS: He flew several DVIIs. The one with the most photos is actually an OAW DVII. He also Flew a DVIIF. One other thing is that the Ex Jasta 6 Triplane was also flown by Udet at a time when Parachutes were common in JG1.