These caps were used on many Skylarks and other Buick models that had the A-body style rally rims. They fit a 2 1/8 in hole.
They were on my GSX when I bought it, but I have since corrected that. I guess I could have cleaned the water spots off before I took the photo.
I had these on my '71 Skylark. In 1970 the outer edge was serrated (vice smooth); which is what my GS has. What you have is easier to find than the earlier model, but I don't know the current price. Repos at Year One are $78 each. -MIG
