At least one London gunmaker made boxlock guns.Namely Cogswell and Harrison.In his book Experts on Guns and Shooting,[Published in 1900]G.T. Teasdale Buckell describes in chapter XX1V , Edgar Harrisons adaption of precision machining to reduce the cost of shotgun manufacture. In this chapter Mr.Harrison States,""every part of our cheap guns excepting for the tubes is made in our Gillingam street works."Mr Harrison points out that owners of guns bearing our our name can be confident that it was made in our works,In preference to a gun made elseware, bearing a London sellers name.

Roy Hebbes