Charles "Sparrow" Young won the 1926 Grand American Handicap with a 100 straight from the 23 yard line, shooting an Ithaca SBT. Back in the first decade of the 20th Century he designed and manufactured a two-shot "pump" trap gun. "Trade notes" in the first column on each page --
http://library.la84.org/SportsLibrary/SportingLife/1902/VOL_38_NO_19/SL3819014.pdf

http://library.la84.org/SportsLibrary/SportingLife/1903/VOL_42_NO_10/SL4210018.pdf

The gun in question looks much more modern than Charlie Young's gun. I'm not sure whether I think it looks French or Swedish.