It looks like a interesting find. Have you measured the barrel walls thickness. That is the real issue with any double. Are they too thin or still thick enough to shoot? Anything under .020, within the first 20" are thinner than what I shoot. Also I would check the chamber length very carefully. If they are now 2 3/4" instead of 2 1/2" they may be too thin in the chamber area to shoot safely with anything other than the tubes. Sometimes when they fit tubes they lengthen the chambers to gain enough metal for the tube chamber area.

As to the maker, I suspect it is more a finisher or even a retailer than a maker who made the gun from scratch. Perhaps it was brought in in the white. Many, if not most boxlocks, seem to have been built by the trade and had the retailer/maker name added to the side and ribs. If it has a Birmingham proofs, instead of London proofs I would expect that it was made in Birmingham for the trade. They made a lot for the trade as they say.

[Linked Image from p1.gunbroker.com]

Last edited by KY Jon; 02/03/22 05:27 PM.