Do anything to it other than leave it exactly like it came from the factory and now it’s NOT an unissued piece of history. You’d destroy the value Instantly.I don’t understand why oiling the metal decreases the value. That would probably be one of the first things I would want to do. Disassemble, oil, functions check, then to the safe it goes. Just having that peace of mind is worth more than money to me. I guess it’s like having an old barrett Jackson car, you know it’s worth money but you have to know it runs too. Just my 2 cents.
CMP was selling in their stores a few years back WWII Correct Grades for $3K+tax. The GB rifle looks correct except for a Winchester follower from I could see. Should have a serifed "13" followerI understand unissued. How common is all original/correct and not having been corrected by the owner?