I came across an old GM Genuine Parts Box that had a steering wheel horn ring still in it. I have been trying to cross reference the part no. (on box and horn ring) and cannot locate it anywhere. Closest pictures I find are 62/63 Pontiacs. Part no. is 538729. Can anyone tell me if this is Pontiac Bonneville? THANKS!!

I looked around and could only find parts listed back to 1980. couldn't find any listing for that part number. Could you post a picture?

here is a photo. thanks!!