The "recall" came from a post in the forum I read the other day. I never heard about a recall, and I've owned my '69 X77 Z since 1973, serviced it for a year and a half at the Union 76 station I worked at before I bought it. The trim rings and derbys, which I so carefully removed when it was parked on the street (when I was at school), are original to the car at least as far back as '71, and they are not 4 clip rings. By the way, all 5 YH wheels are still with the car, too - I resisted the urge to put aftermarkets on it, same as I didn't give in to the fad at the time and cut the roof for aftermarket Hurst T tops.
The only other scenario as to why the rings are "grippers" on my car would have had to have been a recall - or they are originals. 41K miles on it when I bought it for $1600, with Goodyear Polyglas GT's (second set) on car. The wheels have only ever had three sets of tires on them, stored since 1980. Rims are unrestored.
Like I said, this was an opinion, not an argument, based on my experience. If someone has additional info on a recall, silent or not, please chime in.