Here’s some info from Jesse on one of my pipes, which might answer the question of whether a pipe is a true Barling. Just because Barling didn’t source/shape their own briar for every single one of their pipes, I would still consider them true Barlings.
“Barling often stamped the dealers' names on their pipes especially in the early years. This one was made by Barling, not just mounted by them. Up until 1906, Barling turned only a percentage of their bowls and like their competitors bought a number of stummels from St Claude for finishing and mounting. In 1906, Barling made the decision to make all of their own bowls after the pipe carvers in St Claude went on strike for better wages. It probably wasn't until 1907 that they were in position to do all of their own manufacturing. Prior to 1906, Barling made some bowls, which were stamped with a ‘Barling's Make’ stamp, and bought unfinished bowls from St Claude for finishing and mounting, which were not stamped with a ‘Barling's Make” stamp. Unlike Barling, the other British manufacturers continued to buy stummels from St Claude for decades, stamping the with ‘Made In England’, or ‘Made In London’ even though it wasn't strictly true.”