I've said this before - but this is just a reminder. I'll be breaking BOTL over time in order to get it into a far better place. Just be patient if you can't reach us! We'll be back
My guess is they were very popular in the old days (pre 1960s) when smaller ring gauges were popular. For me, smaller gauge cigars get overheated quick and a mouthpiece keeps the smoke cool without changing the qualties. I have a 50rg that a rarely use.
Boswellpipes.com is JM's website and click "pipes for sale" and if they're available call ASAP to get it since he does everything by hand one at a time.