William Brophy did not mention that Fulton and Hunter Special box lock shotguns were also shipped to Rochester Ordnance. Fultons (507) and Hunter Specials (186) accounted for nearly a third of the 2,228 military shotguns.
William Brophy's book is titled "L.C. Smith Shotguns"...why do you think he should mention, serialize or detail Fulton's and Hunter Specials...?.....
Most intelligent people understand what this book is about and why all the gun manufacturing totals are for L.C. Smith shotguns from Syracuse through Marlin, and not Fulton's and Hunter Specials.
The initial poster is asking specifically about an L.C. Smith shotgun barrel marking, not Fulton and Hunter Specials or the Naval gun parts that Hunter manufactured for the U.S. Navy, or any other drivel.