I'm having a tough time finding out if a given pipe has a vulcanite or acrylic stem. I find a lot of contradictory information online. Can anyone tell me whether the following pipes have vulcanite or acrylic stems. Also please let me know how sure you are about your answers. Bjarne Viking classic Stanwell classic blast Savinelli toscana pipes Savinelli pisa pipes Savinelli florence pipes Savinelli venezia pipes Thanks a lot!