Wheel ID

I have two of these wheels and not sure if I should hang on to them or send down the road as rollers next time I sell a project car. Looks like they are from 1976? Are they light truck wheels? Do they resemble an early wheels and maybe I would keep them and for a spare tire setup in the trunk

They are "late" type steelies from a car - 15x6.5". These have the valleys in the spider, which is why I call them a later style wheel. They will accept the 1968-up smaller dog-dish cap. 15x7's are more desirable than these. These are the style 15x7's I used to sell:

http://www.classicchambered.com/rims/15-7.jpg