I have two and they are fantastic smokes. Dunhill Navy Rolls is a good VaPer in a briar but absolutely stellar in my porcelain hunter. Brings the perique out from mellow to full punch you in the nose!
A few words of advice on using one : remove the bowl if you want to tap out the ash otherwise you will get covered in tar etc where it collects in the reservoir under the bowl. And always clean the bowl with a damp tissue once it's cooled down because if you leave a cake to build up your pipe will be in danger of cracking. Also if you buy from second hand make sure you check the lid because there are a lot out there with rust all over them. Your bowl should only really be filled to the half way point or you could be looking at a 4 hour smoke!. I normally put out enough tobacco that I normally use in a briar and load it from there. IMHO they are the best pipes you will buy for a cool dry smoke and I wish I'd found them before I bought my other pipes. You will notice nuances in your blends that you won't taste in your usual pipes and I smoke flakes in mine with no problem.
Lightning one can be a bit of a challenge and I use a butane lighter with a long nozzle like you would use for lightning a bbq, and you have to take quite long draws because of the length of the stems. As a rough guide the bowls on mine are approx 2"long x 1" wide.
You can buy them new from Germany
GERMANUS - https://www.german.us › Pipes › Pipes
These are a few of mine, although I much prefer the porcelain ones.
Web results
Hunter Pipes - GERMANUS