Langdon- Beats me. The aircraft is obviously a Jasta 6 aircraft and may not be "his" Triplane as stated in the caption on page 171 of Paul's book. We know 454/17 was his regular Dr.I until his bad crash on 13 March 1918. Lothar scored all his victories with Jasta 11 and was never assigned to Jasta 6 as far as I know. He was JG I commander well after the Dr.Is had been replaced. I know MvR used Jasta 6 Dr.I 525/17 when he visited Jasta 5, but have no idea why
LvR would be flying one of their aircraft unless he and MvR went somewhere together and MvR requested Jasta 6 to support the flight. There was some passing around of early JG I Dr.Is, but they went from Jasta 11 to Jasta 6 (example Dr.I 119/17), not the other way around.
Taz
Terry Phillips