Fabric thought to be from Fokker Dr. I 425/17

These fabric pieces and their dope and paint meet all of the general requirements for authentication as German aircraft fabric, dope and paint.  They are believed to be from Fokker Dr. I 425/17, serial number 2009, the triplane which Manfred Von Richtofen crashed and died in on April 21st, 1918.  Two very small slivers of wood are attached to the piece on the left.  The photo at the lower left below, upper arrow,  shows the affect of acetone to the blue-pigmented dope which is soluble to it.  The red oil paint is neither soluble by acetone nor sulfuric acid.