I sent for my gun info. several years ago from University of Glasgow,It did not reveal the maker of the gun.From memory there was a box with sort of a small amount of "company" shorthand, therein possibly would be the answer.On the page I received were a number of Colt Lightning (again from memory)rifles.And the name of the purchaser of my 12 bore hammergun, (Hawker) would have to look again for his initials,would sure like to know who Mr.Hawker was related to,
this was 1887