Looks like the black rings behind the joint are black linen phenolic and the same on the shafts are a non linen black plastic. Looks like the sleeve has non linen as well. Interesting.
Check out the joint screw- I believe that Karl Meyer used a 5/16 18 piloted joint screw- at least he did on one that I owned. also, many of his cues were located in the PA. / NJ/ NY areas.