Chris Batha the sporting clays instructor and author. He owns the Boswell name, records and is making new guns. He is easy to find with Google. He is a great guy. He'll be at the Southern SxS in Sanford next month. You can email him your SN. If he has anything he'll let you know. He stays busy, so don't expect an immediate reply.
Hoser, I have 5 Boswells laying about. One of them is a once nice 8 1/2 lbs 12 hammer pigeon gun proofed 13 bore 14 muzzle. It is one of the stranger proof markings of any of my guns.
Joe