[Researcher]

Those sponge rubber pads first hit the market as the Huntley recoil pad --

Huntley Recoil Pad H & D Folsom circa 1916.jpg

but by 1916 the had been acquired by JOSTAM and became part of their line. A 1916 JOSTAM folder --

JOSTAM 1916 01.jpg

1937 JOSTAM catalog --

JOSTAM 1937 Catalog, Sponge Rubber Pad, PATENTED APR. 10, 1917, S.A. Huntley Patent No. 1,222,29.jpg