DEB. Outline colour versus basic colur inside outline = same
(its if you see two colours on the same letter, then the shit has hit the fan)
(Black outline in White excluded)
Nick. Yes, basically. If (one) Group was more than three StaffelŽn (White, Red, Yellow)...
(F)/123 had all six, but as we know 6.(F)/123 was rather more special ..
http://www.ww2.dk/air/recon/aufkl123.htm
"If an fourth or fifth Staffeln was added to any Gruppe the colour was Blue and Black respectively. " (my manuscript :-) )