Back in the 60's, my Dad was a Director at Remington. He was having trouble breaking down/reassembling his M31. They sent him instructions with a handwritten note on the sheet saying "Please don't lose these. It is the last set we have". I still have and use those directions. Anyone remember the days before Xerox?
BTW , that gun is still my favorite duck gun. In order to shoot steel thru it, I had Briley install a thin-wall steel shot choke. What a gun!