Thorny,
Beesley toiled for Purdey's, and struck out on his own when his ideas could no longer be contained there.
Nobody who ever worked there (save, perhaps, Manton) could compare to Freddy B. That is the truth. Don't think for an instant that the Purdey team didn't rue the day he went out on his own.
Looking at it from that viewpoint, the Beesley has it's roots firmly intertwined in the Purdey tree. The run of the mill Purdey we find these days (if there can be such a thing) has a hard time comparing to the gun you already own. If you simply must have that name on the rib, seek it out, then. But be honest-nothing, exactly nothing, will be gained by doing so. And anyone who knows anything about the London gun trade will have little choice but to agree.
Best,
Ted