Hello,
Currently on ebay is a photo of a DFW B.I named Bülow,based on the return address (?) above and to the left of the postmark belonging to the Flieger-Beobachterschule at Jüterbog :
https://www.ebay.de/itm/b85457-Fotoa...gAAOSwEehbNhFq
However the style of the name on the fuselage is not unlike that of other DFW B.Is as mentioned earlier in the thread belonging to FEA6.
Regards,
Clint