Actually, there is not really a "Cumberland" stem, but a Brindle, which is a colored vulcanite (or Ebonite) material. Dunhill was the first with these stems on their "Cumberland" line. Cumberland referred to the finish of the briar, not the stem. The brindle stem was originally called "bowling ball" by Dunhill. It was used so much, the term became synonymous with Cumberland. Real Brindle stems are vulcanite, but now some makers also make a simlar appearing stem from lucite. At least that is what I have read.Just curious -- are all the pipes shown thus far fitted with "real" Cumberland stems? Because I noted a Savinelli Bing's Favorite pic here -- I have one of those pipes that looks identical to the pic, but the pipe stem has the Cumberland "look" but it's actually Lucite.
Supposedly, "good" genuine stock has been difficult to come by so many makers have gone to Lucite for their "brindle" stems instead.
Correct me if I am wrong, but I thought Cumberland is not Lucite, but more like Ebonite and Vulcanite?