What Mopar Wheel Is This?

[69Chevelle L78Deluxe300]

I recently found 5 Mopar 15" wheels that fit a 70 Challenger, but can't figure out what car they were originally from. I think they are 7" wide. I don't know how to attach a picture so I will try to describe them. (I can email you a picture if that would help.) The rim is painted black, the center of the wheel is Chrome with 16 rectangular slots. There is a center cap that bolts on with three little bolts and a snap on trim ring. When all assembled it looks like a chrome wheel. 4 of the wheels have H78X15 Custom Power Cushion Polyglas tires that look like they are from the 70's.
Thanks for any help!