http://pipesmagazine.com/wp-content/blogs.dir/1/files/album/17727/gbd-speciale-london-112x150.jpg
I recently acquired a GBD Speciale with a silver band. The hallmarks were well worn but research leads me to believe the hallmarks read city of London, silver content 925, and year of make 1915-16. What surprised me was what I believe is a draft hole incorporated into the base of the pipe. Can anyone shed some light on when this practice began and when was it discontinued? Thanks!