They're gloss black, but the paint was a lower quality bought in bulk by the wheel company. The wheel paint didn't need to be of the same quality as the body paint- even lower quality for radiators,and other painted chassis parts.
I think this is the best explanation I have heard. If you compare the gloss paints of today to the original bead area, there is a difference.
The semi gloss paints of today are a good match to the original finish, regardless of what it was called in 1969.
Good discussion guys. I think we have an answer? I will post a picture later today of the original lug nuts.
DD