Riviera Centre Caps
Externally, there is no visual difference - and these NOS caps are expensive !!
The early style caps did not age well, as the peened pins were subject to corrosion, and once the retainers seperated from the centre cap - the only way to properly repair them was to drill and tap the centre cap for screws. The prongs on the spring steel retainers also broke easily, and it was much easier to replace the retainer with the screw type holes.
If your later style centre caps are in good shape, I would just stick with them.
If they are not the best - you can buy complete repro centre caps, (...with screw type retainers),that are much better quality than original NOS caps, for a lot less $$$$ ! :thumbsup: