Hi Mike and Dave,
Yes, this German lozenge fabric artifact has been studied very closely. It has it all - repeat pattern 5 color lozenge fabric, lozenge rib tapes, threaded rib stitching, clear dope coating, varnish outer coating, pencil tracings from stencils marking the German cross outline for painting, black and white painted German cross, two stitched fabric joiner seams, fabric undersurface remnant patterns from the D.VII's top left wing's serrated plywood leading edge, etc.
I have several close up photos of this fabric, thanks to my friend Robert Karr's study of it.
Yes, much provenance here - this large piece of fabric came from the Lt. Clayton Bissell
estate as one of his Fokker D.VII victories from combat action on October 28, 1918, NE of Jenlain, France. Bissell was flying a Sopwith Camel with the AEF 148th Aero Squadron at the time of this victory. I have a couple other artifacts from that same D.VII, as well as Bissell's Combat Report of that action, and a photo of his Camel.
Good stuff, eh?