MCM Lightolier Track Light Fixtures

I've tried and I can't find a web source to find model numbers on MCM Lightolier track light fixtures. I have two simple cylidrical fixtures and two that are slightly conical that are a bit larger from ~1970. I want to post them for sale and want to know what to call them. I also have four 7'+ lengths of 2 circuit aluminum finish track, one 7'+ 1 circuit track  and several shorter lengths of 2 circuit track. Again I can find no part numbers to describe them. All were bought new from Lightolier around 1970.
https://imgur.com/Nl8Kodb
Thanks,
baumgrenze