I've been laid up ill for the past few days so can't access anything i don't have at home, and oddly very few pictures i have here are Fordson types. I can't see any other types with black front wings in my pictures, but you're right it seems to be a Fordson thing, maybe because it was how they painted their civvy output? Maybe they are being knocked up on the same production line and the front wings came ready painted before attaching? I honestly have no clue, not having noticed this Fordson quirk before.
Also if i recall correctly, the blue-grey paint at the time should be matt and the black on those looks like gloss