For what it's worth, the true original centerline caps had a "C" with an " L" through it, like an engineering logo for centerline. The one pictured is the second version.
As I'm sure you know, the 5 on 4 wheel used a smaller cap than the normal pattern wheels, and are much harder to find. I have three pairs of small bolt lines.... but only two caps. I haven't found anything that works for the missing ones yet.
Edit: I had four lug centerlines on my V8 Vega many years ago, but I couldn't tell you if the caps were the same for 5 on 4. I suspect they were.
