Yeah the oddball plated parts are definitely not factory, and the more I look at it the more I agree it's been refinished...There are polishing marks in the frame even though the stampings are intact...I'll get the innards fixed, see if I can get the sideplate to fit...SCSW dates the S/N to 1952-53 as you suggested...At $300.00, I don't think I'll get hurt......Ben