Xan
Interesting! I was of course going by David Méchin's profile of S.VII No 406 on Albin Denis's site:

... but was No. 406 also the same aircraft as the photo you posted showing Pinsard in "Revanche III"? If so then I think your theory is correct, since the
léopard de Bornéo certainly appears to be white.
I'll be following with even more interest to see what your conclusions are!
Dutch
(who walked through the Basque country on the Camino de Santiago, and formed a great liking for the people, and particularly their wonderful Akerbeltz beer!

)