It has been a few weeks since I found my .308 L579 at a pawn shop for an out the door price or $534. I have been reading and think the engraving might have been done in the factory, I could be completely wrong. Looking the S/N chart 11309 was manufactured on 03/29/1960 mine is 11305 would it be safe to assume that is probably the date of manufacture for mine? I appreciate any help or thoughts and sorry for the rambling it’s late and I’m sleepy.