Thought I'd keep this separate from the wheels. For 1969 I see
3901708, 67-71 "ALL WITH RALLY WHEELS ATTACHES WITH 4 CLIPS" and 9796696, 69-71 "ALL WITH RALLY WHEELS ATTACHES TO WHEEL WITH 16 SERRATED TEETH"
That's the first instance I can think of where the book lists two parts for the same application. The rings I have seem to be the latter, with 16 teeth.
For my 70 2+2's, they have different rings. My convertible has the 4 clip type (and an elliptical valve stem hole) and my hardtop, built only a week or so later has the 16 tooth type (and an oval valve stem hole).
When I upgraded my convertible to 7" wide wheels, the 4 clip type trim rings just wouldn't go on, as the steel ring inside the trim rings just wouldn't shrink the necessary amount.
I also have a couple different types of the 16 tooth version. Some have straight teeth, others have zig-zag teeth (which I think are later). The zig-zag teeth ones won't go on my Pontiac Ralley II wheels, they're just a hair too big. I'm not sure about the chevy ralley wheels.
