jOe, The gun was originally proofed at 13/1 both barrels,that signifies something less than .729, and they now were re-proofed at
18.7 which covers .736-.740 ,so some bore metal has been removed .
Might be plenty left but I would check current bore size and minimum barrel wall thickness. Rib says manufactured for George Gibbs,this applied to most makers,Gibbs just chose to tell people.
LOP of 14" over a pad/extention??,little short for me but if the shoe fits etc.Looks like a good quality shooter with recent nitroed original barrels.Price seems fair
