Richthofen suits up pre-flight at Roucourt, presumably next to Le Petit Rouge. Photographs reveal Albatroses occasionally had their serial numbers chalked onto the ailerons, and thisd appears to have been done with this machine. Tantalizingly, the serial number is illegible.

Richthofen suits up pre-flight at Roucourt, presumably next to Le Petit Rouge. Photographs reveal Albatroses occasionally had their serial numbers chalked onto the ailerons, and thisd appears to have been done with this machine. Tantalizingly, the serial number is illegible. (picture source: Inside the victories of Manfred von richthofen - Volume 1, James F. Miller, Aeronaut Books, 2016)