In article ,
Bill Burns wrote:
I came across an interesting reference in a history of aircraft markings
book to an apparently short lived, early war upper-wing national marking for
WW1 RAF night bombers. The reference described it simply as a white disc

Nitpick, perhaps (though it might be useful when chasing this out) -
if it was early WW1 then the bombers would have been RNAS (Royal Naval
Aviation Service), not RAF (which wasn't formed until 1918). Naval
aviation markings were initially rather different from those adopted
by the army (Royal Flying Corps), so the best place to start looking
is sources on naval aviation - have you tried contacting the Fleet
Air Arm museum at Yeovilton?

--
Andy Breen ~ Interplanetary Scintillation Research Group
http://users.aber.ac.uk/azb/
"Time has stopped, says the Black Lion clock
and eternity has begun" (Dylan Thomas)