It does not happen often, but I just finished working on a M1928A1 Savage trigger frame, that has without question, been un-touched since the day it was made. The mechanism pocket had 3/16" of hardened dirt/crud that had to be scraped off the parts. The springs were cemented in their holes. Even on the outside the pivot plated was buried in crud. The thing of interest is the serial number and that the frame has the checkered safety and rocker pivot. I don't know when the switch was made, but frame # S-116791 has checkered levers. The reason the frame looks good now it that I glass beaded and blued it - there was very little finish left. Also don't be alarmed at the cutout on the wood grip. That is just a stray grip that I fitted to the frame to make it easier to hold while assembling it.
Bob