The ring around the shank is the same material as the discs. I did as good a comparison of the wood on both sides of the ring and disc adornment, and I am pretty convinced it is from the same block of briar. The pipe dates from between 1958 and 1965. I verified that with a pretty respected pipe expert. I do not think the stem is original, but there is no way for me to say for sure as it seems Charatan did not always stamp everything they were supposed to. I suspect a real expert could tell by some other features.
I got it in a few days ago. It IS fairly LARGE at about 2 to 2-1/8 inches in diameter at the base, and about 2-1/8 in tall. I can't see into the shank well enough to tell if there is a metal tube in there. Probing around inside with a wire, I cannot feel any edges of a tube, nor a seam, in which case the same wire sends tactile feedback from the outer "seam". There is a 4 stamped under the bottom of the shank. I was told it was significant, but the seller couldn't remember what he was told. It has a Lakeland ghost, which I will start working to eliminate. All in all, a real nice piece of Briar.