They are not Ralley, they were 2-pc. A base and then a screw on center. 67-68 Ralleys had a short center cap, 69 up had a tall ribbed center cap. 67-68 did look similar to posted caps.
I've seen them before, just can't remember on what. Check on early/mid 60s. Look like maybe Chevy 2, Chevelle/300 lower model caps.