The chronology seems correct, to me.
By: amanico : May 4th, 2011-23:14
Basically: Green, Blue, then Brown, with, as you said, at the end of the 60ies, circa1968, should I say, a 1 or 2 year period where you saw both blue and brown boxes. Things are not easy with Burgundy boxes, and specially the box of the DSA US ( Who knows...