Parker "Trap Model" forend now available on the double gun

May 1922 Outers' Recreation
https://books.google.com/books?id=9ns7AQAAMAAJ&pg=PA436

June 1922 Forest & Stream
https://books.google.com/books?id=00woAAAAYAAJ&pg=PA262

Illustration
https://books.google.com/books?id=yJY7AQAAMAAJ&pg=PA721