METAL OUTER BOWL
Non too sure where this fits. It certainly has a metal outer, but not a briar smoke chamber.The actual chamber appears to be a transparent quartz material. Was this perhaps designed for other than tobacco use?
The cooling vanes, ie the outer casing seems to be split vertically to facilitate removal of the bowl, in fact that seems to be the only way to assemble or dismantle the pipe
The stamping round the rim reads The Quartz Bowl Pipe Pat Pend Quartz Industries Chicago U.S.A.
Overall length is 5 3/4" chamber is 1 5/8" deepand with a diameter of 1 inch