There are no part numbers stamped or printed on ANY of the GM 3 spoke wheels. (cushion grip, comfort grip, or rosewood) There is a groove molded on the outside, but these wheels DID NOT use the stainless steel trim that the common chevelle wheels had, and the rim of this wheel is much thicker than those wheels. This wheel was not a factory option on Camaro or Chevelle. It was used in 1970 only as the factory wheel in the Buick GSX, in which only about 700 or so were produced, so aside from 70 GSX, this is a Yenko-only piece. It should also be noted that these wheels do not have the molded finger grips on the backside, as the 70 Chevelle comfortgrip wheels had. I do have an NOS GM thin comfort grip wheel with the stainless band on the outside too...is that what you are looking for??
Here's a comparison pic.
