The use of the B Barling & Sons logo has an interesting history, which goes back to the turn of the last century. It used a different logo than the crossed Barling stem logo, and then disappeared from the market, not to return until the early 1960's. At that time it was used for a budget line of pipes, not exactly seconds just pipes whose wood was not quite flawless enough to bear the Barlling name, using Barling wood. B. Barling and Sons appears on the Vintage series, which were produced in Barling's Portland Pipe factory, a division of B Barling & Sons. Later the B Barling & Sons line was produced in a full range of grades, including a Guinea Grain.
I don't know when this full line first appeared but my guess is that it came into being around the time that the factories closed, around 1970, or a little before. After the Barling factories were closed, production of Barling pipes was outsourced to Charatan and to Oppenheimer, and it's likely this pipe dates to that time, so somewhere between 1970 and 1977, when production was shifted to the Nording factory in Denmark.
Information is pretty scant, so these dates may be revised as more information comes to light.
