[1960HDGMC]

Hello, I have gathered a few pictures for reference. The first two are a front and back view of a known original 1961 GMC 1001. The truck has a high production number, in the 17,000's. I have a hunch that the skinflint nature of 1960's GMC production involved using old stock wherever handy. I know they used the same hubcaps that go back to the 1950's ,just changed the paint scheme and color. You can find the red centered caps, and convert the paint to your 1960 GMC pattern. It is a job, but it can be done.
The third pic id of a 1958 GMC Suburban Pickup. It has the red cap and what appear to be factory rings? Question, do these rings need the four "nubbibs" to attach? Do they extend over the leading edge of the wheel, or did this owner chrome plate his wheels? Is this the "cameo wheel" that GMCNUT refers to? I am going to ad some pictures of two spare wheels I have. One is narrower and has nubbins. The other does not. But they are the exact same profile. This may be a breakthrough moment on this wheel deal. Has anyone else seen the TWO different wheel configurations featuring the same "Potters Wheel" profile?
The last wheel is on a factory 1960 Chevrolet 1/2 ton fleetside truck. I believe it is a Chevy only wheel. I think this because I have never seen them on an original GMC. They may have shared wheels across the brands, but I have no reason to think they did, as of now. I will take pictures today of the two Potters Wheel type wheels and post them when I can. Thanks for any input, Greg Mead