I have a 1930's Dunhill 'bowling ball' stem that I fitted to a1936 Dunhill. The earliest bowling ball stem example I can find is a 1933, and all of them that I've found were fitted to 'Root Briar' pipes.
Questions: What's the earliest that these came out? Were they a stem option for pipes other than the Root briars?
Questions: What's the earliest that these came out? Were they a stem option for pipes other than the Root briars?