There are some pipes that, despite not being the most expensive or most prestigious, tend to be magnificent smokers. That's the case with my old Frank Medico with the Rock Ambera stem.
The "rock ambera" stem was a type of faux amber that sort of feels like stone. Also, it says "Filter Pat.Pend", which means it's a pre-1933 pipe too. I haven't figured out an earliest date for this pipe yet, but I think it's likely 1927. So it's between 1927-1933.
I don't know what exactly is the reason, but out of all the pipes I smoke regularly, this one is the best. I think older pipes just seem to have that special quality. It always burns down to ash; always smokes dry; just always gives a perfect smoke. Plus I really love the feel of the rock ambera stem.
I'm smoking some EMP from it this morning.