Okay, let's do this ... get some pics and up load them to this thread.
I'll move this thread to the Research Forum and maybe the guys that haunt that forum will have some ideas.
With some good pics, we may be able to identify the hardware, even if we aren't able to name the gunsmith. Get a couple of good shots of the barrel side and the breech side with the action open, as well as side shots of the whole shotgun.
"The irony of the Information Age is that it has given new respectability to uninformed opinion." - John Lawton, speaking to the American Association of Broadcast Journalists in 1995