I bought this Dr. Plumb "Personality" in Hamilton, Bermuda in 1977. I know that Dr. Plumb was made by GBD as a counter to Dr. Graybow but I'm a bit confused by the band markings on the pipe. I tried to get close-up shots. One of the marks is K-P in a diamnod shape whie under that are some hamarks that I can't make out.
Any guesses as to what the markings mean?
Any guesses as to what the markings mean?