They seemed to become an item of interest for trap guns in the years after WW-I. I know A.H. Fox Gun Co. made double guns with "beavertail" forearms in the 1920s, but they didn't appear as catalogue offerings, or on price lists until 1931. They are not offered in the 1919 Ithaca catalogue, but they are offered on Grade 4 and above in the 1925 Ithaca catalogue.