i have an original star first contract g-1 that has distinctly red red knits. they are original to the jacket. when looking on the inside, and closely at the fibers, one can see that there are hints of brown. i have come to the conclusion that there was a knit company that made a type of brown knits that faded fast, and when they did so, went from a brown to a red brick-brown. this may even be the case with war time aero a-2s, as the color of the aero "iconoclastic" red knits vary all over the place. some are very brownish, while others are cherry red, and others yet, are more orange. i have handled lots of, and own original aeros, and not a one set of knits matches the others. whats more, even on the same jacket the knits may be a different shade.