Another ID challenge - 'G Numbers'

[Grovetown]

I have a large piece of framed fabric purportedly from a Fokker DVII.

There is an old label which says:

'German 2641. Fokker DVII side fuselage lozenge camouflage and late style Balkan cross. Year 1918'.

(Elsewhere it also says 'Donated by P. Fairchilds 18-6-1927. Reframed 1-1-1957'.

My instinctive reaction was that 'German 2641' was a long form of the 'G Numbers' ascribed to downed enemy aircraft by British intelligence. However, 10 seconds in Franks et al's The Jasta Pilots disabused me of that. While not all numbers are recorded, it doesn't fit either in the early 3-digit numbers or the later Brigade style ones.

Could it still be a G Number?

My next thought was that it could be the aircraft werke or serial ie: Fokker DVII 2641/18. But sites with DVII serials I've googled don't offer anything close.

I also wonder if P. Fairchilds was the victor?

Any thoughts (even if to recommend a book that might help)?

[Grovetown]

Dear Dan-San

Herewith as discussed. The 'scale' is marked at 10cm intervals, with 5cms in-between.

Best wishes,

[Grovetown]

And another:

[Grovetown]

And the reverse:

[Grovetown]

And one more of the reverse:

[Grovetown]

And the offending caption: