Originally Posted by Zero.Zero
I went home and took it out of the safe an I could see another lable under the green one. I could not get it off but when I looked at the stack of paperwork he had for the gun I found the original paperwork, manuals, product registration and all the stuuf that came with it. There was also a 1991 owners manual where he wrote down that it was sent back to glock for an update. That explains the updated label on the box. The receipt says he paid $499.99 back in 1988. Im going to take better pictures tonight.
Look at the internal parts: trigger bar, plunger, etc., if they are a gold or silver color then they were most likely replaced by Glock when it was sent back. The original parts would have been black. They would have affixed the new label at that time.