Yep the ones I bought in 1960 were 24kt Gold plated. The ones now are not. I also still have mine. Ray Bans are cool but you can not put them on when you already have on a helmet..
That dream came true for me when I had cataract surgery on both eyes. First thing I bought was "real" sunglasses, not clip-on monstrosities. I'll be checking out the sunglasses at yard sales this summer, might find a nice pair of those aviator glasses.
The STAUER Company has sunglasses called EAGLE EYES [ invented by Uncle Sam if I remember right..] that are outstanding. They are of the aviator style.
And so it goes...