Well, the only ones that should have recoil pad were the 12ga 3" Duck or Magnum guns. They offered Noshoc, Hawkings, Goodrich and Jostam pads in addition to Winchester pads. On gun shown above I would prefer plastic Winchester plate or checkered wood butt. It looks really bad especially with the plugs missing. While Model 21 with exception of 3" 12ga guns does not really need a pad people in America luv them rubber pads. No idea what is on Winchester letter all I have is copies of two A.H.Fox letters from guns I used to own.