The 1916 Hibbard, Spencer, Bartlett & Co. catalog listed the Jostam "Anti-Flinch" and 2 I have not heard of nor find with an internet search; Philadelphia Ventilated and Y.C. - Young & Cadwallader.
H.W. Cadwallader was a well known trap shooter from Danville and later Decatur, Ill who was active from the late 1890s to after WWI. He was a Peters Rep and competed as a Professional at the 1915 Chicago GAH
https://digital.la84.org/digital/collection/p17103coll17/id/24997/rec/201

https://archive.org/details/HibbardSpencerBartlettCatNo611916/page/n1639/mode/2up

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