OK, go here guys for many of your lozenge fabric study answers:
5 color lozenge
To me, the "LVG" fabric sample study shown in the above article is the most likely accurate, i.e. "factory fresh" set of 5 colors for the upper lozenge patterns that match my faded, 90 year old original lozenge fabric. Also remember that a final varnish coat that caused fading and yellowing over time was applied over the clear doped printed lozenge fabric.
I'd say your lozenge colors are so very close, but I simply do NOT see the upper 5 color fabric's TOPside surface outlined with the "stained-glass" effect around the lozenge patterns in any original fabric samples that I own or have seen, however I DO see this effect clearly on the BACKside of the fabric, as shown here again in my original Fokker D.VII upper left wing, top surface fabric. Note in the split-view photo that the lozenge pattern color dye was applied to the TOPside of the fabric surface, and does NOT also penetrate with the same color bleed-through on the BACKside of the fabric, but it DOES indeed show a "stained-glass" effect of overlapping color, but again on the BACKside only.
Also shown again is the "seam" spacing of about 47 3/8" (1203mm), but DO consider some shrinking probably has taken place over the last 90 years! Again, the "seam" spacing is not the same dimension as the repeated lozenge pattern spacing.
Perhaps I could just measure each lozenge pattern for you to get more accurate dimensions?
(Many thanks go to Robert Karr for the photos and study of my fabric!)
Regards, Gary Sewall