I'm not sure if this is one, but I've seen some lower grade Boswells out there that I suspect are connected to the colorful history the London (London, Ontario Canada that is) gunmaker Frank Malin. A search for the term "Malin" on this website will fill you in.
In 1988, Charles Boswell was purchased by U.S. interests and Cape Horn International (previously Cape Horn Outfitters) located in Charlotte, NC, was retained to sell and manufacture the Boswell Guns in the U.S. In addition to acquiring their entire inventory of English manufactured firearms, Charles Boswell fabricated new shotguns and double rifles in the U.S. using the best materials including English lock mechanisms and retained the Charles Boswell Co. trademark. Every gun was custom ordered to an individual client's requirements/specifications. Previously imported by Saxon Arms, Ltd., located in Clearwater, FL. (Blue Book Gun Values)
MALIN, F.E.
Previous manufacturer located in England. Previously imported by Saxon Arms, Inc. located in Clearwater, FL. Charles Boswell purchased Malin shortly before manufacture stopped. (Blue Book Gun Values)