de Mund. Could it be a Daly?
Sousa and his Daly SBT
World's Record Trapshooting Squad. Record 497 out of 500. July 4th, 1915, Maplewood Club in the White Mountains, New Hampshire. A.G. King - 99, Ralph Spotts - 100, Chas. Newcomb - 99, A.B. Richardson - 99, Fred Plum - 100. Newcomb won the 1915 GAH.
Spotts and Newcomb both used Daly SBTs
Jay Clark, member of the 1920 Olympic Gold Medal team with his Flues SBT
Otto Newlin, winner of the 1927 GAH with his Smith Crown SBT (no FE groove)
John Hendrickson, member of the 1912 Gold Medal Olympic Team. I think it's a Smith.