Greetings Joachim, Richard B., & Crankcase,
The cowling panel, nose vent holes, and the cabane struts (NOT TRESTLE!) remind me of the Rumpler B.I.
HAPPY TRAILS, FOKKERJ
P.S. Oh yah, I forgot to mention the cowling panel is "SQUARE" shaped, engine with "Rhino" exhaust and water tube running above the length of the cylinder heads also the fact that my foto shows wire spoked wheels.