oneoldsap, I bought the rifle new so I know the but-plate is original / factory. Now that I think about it I may have purchased it in 72, 73 or 74. It’s not a two piece, its one piece of plastic \ bakelight or whatever was in use at the time. It has screws top and bottom and on the right and left side center.
Sure, I could have purchase a aftermarket pad, sanded it to fit the couture of the stock (did that for one of my shotguns) and drilled new mounting holes in the stock (holes in pad for shotgun just happened to match) but I wanted the stock / rifle kept so it could be returned to original condition. Now that I’ve put a muzzle-brake on it that’s out the window.
But it sure did tame the recoil.