After more thought, I would agree with the SSAN ID...also deleted it, as the original owner should have done before selling it...I've seen this suggested as a positive means of identifying stolen weapons, but you do have to have a way of removing it, too...Annoying to find that the seller left it on...
Ron or Tom, where or what site did the DDR make the Luger receivers/barrel extensions??? Was it an old WW II plant, with machinery & prints/patterns/suppkies captured intact???