Bill, I can't help much either although for a number of years I owned a nicely engraved boxlock which is now for sale through a reputable dealer in Alberta. My gun had somewhat of a fascinating history which I posted in the past. It was made for "Simpson & Hunter Gunmakers - Edmonton & Alberta " Gun was built in 1907. I can tell you that Charles Osborne promoted single trigger designs and patented at least 3 different designs. The one I had worked well but when I viewed the substantial number of pins, levers & swivels that were integral to the design I realized that should it ever fail it was well outside my abilities and likely those of most of the "gunsmiths" that I know. I believe I would consider the maker a 2nd or 3rd tier maker using Rocketman's template. Still the engraving was top tier and I have no doubt that this maker like others could turn out "best" work if commissioned to do so. I can state that of the very few I have handled they all had that lively game gun "feel" & " balance ". The gun I owned was ordered by a rancher in Central Alberta and delivered to him in 1908 and remained in the family until I acquired it some years ago. I did do some digging on the maker when I first acquired the gun and will send you what I have by PM. I have seen a number of hammer guns by the maker and have heard of sidelocks but all of the hammerless guns that I have seen have been nicely engraved boxlocks with decent wood and finish but not outstanding.
