Having worked on Perazzi guns for many years, I can tell you the early guns had pads that were glued on with a heat sensitive glue, I would lighty scribe around the pad so as to not lift stock finish and then place just the pad in a pan of just off the boil water to soften the glue. A thin knife then gently removed the pad. These pads were predominately Pachmayr trap pad, with the screen surface. When off it just needed screws to reattach. today I would attach the new pad with screws in blind holes and epoxy glue if you wish . Just don't let any squirt out of the joint. Perazzi glued the pad as a labor saver, and then sanded the stock and pad together for fit.
