All that remains is to sit back and enjoy a bowl of an aged Virginia tobacco and read a good story! Shawn, Thanks! I just happened to go to BoB, and found the following link: Leave a Reply Cancel reply Enter your comment here The stem of these pipes has cooling fins up each side, and can be found in a straight or bent form. I can't make out if it says cured but if I had to guess I would say yes. I was left wondering about the variations in the stampings on the Kaufmann Brothers and Bondy pipes.
The next three photos show the circle inset.
WWII, I think. US Pat. Most likely around the time the four digit code was gone so was the metal tenon and crown logo ,replaced with the circle or propeller emblem. Dave Whitney has an article on the topic of KBB pipes. InS.