I'm a small GBD collector with 20 pipes of different grades. I recently compared my first pipe ever, a GBD London( written in a straight line) that is stamped and a GBD London Made oval written and again stamped. There always is this assumption that the rondelle disappeared with the Comoy merger but I wonder if that's the case. Maybe in the last years, the GBD lower grades would get stamped instead of getting a rondelle? I like to learn about GBD history but unfortunately, the sources are very scarce. GBD pipes are beautiful and most smoke very well, the quality of the briar is amazing and I dare to say that for the money paid, those pipes are a great deal on the estate pipe market.
Thank you for any information