The second pic I posted was MLSimpson’s picture. I don’t know what kind of helmet it is. The first one I posted is the picture of the Bell I was thinking I had back in the late 80’s. Although I believe mine was a dark gray color.
I loved that helmet, although it was HEAVY and the tab to change the venting did nothing as far as I could remember. Somewhere I have a cool pic of me doing a TT with that helmet on, my full Greg Lemond Team LOOK kit, riding my Panasonic DX 5000 with a J-disc wheel and Scott DH handlebars.