Stampings are; a faux hallmark over "EXTRA" on the band (brass?) and "PAT'D AUG.23D.1904" over "No. 768508" on the bottom of the aluminum (I think) insert (bottom of what is normally the bowl). A previous posting from 2016 on the forum about a similar pipe HERE, but I have additional info. I have attached the original patent. I found someone online who figured out how to smoke this crazy looking thing, "It is indeed a metal bowl insert to be filled with tobacco, press fit into the bottom of the briar, and lit through the hole in the bottom of the metal insert. Wild." I have not attempted yet, but will give it a shot this weekend.