sigmax, as stated above (The ad; states that Horton Guns were priced between 15 and 60 Guineas.), Horton's made/sold guns of widely varying Original Quality (OQ). All makers, with the possible exception of the Boss name, did this to some extent. It is a mistake to try to associate "quality" with a maker's name. The maker's name has Brand Value (BV). If we combine Brand Value level, Original Quality grade, and Current Condition level, we can make a fair estimate of the gun's value; any gun's value may or may not be reflected in the price asked or an offer to buy.
