The number is 7158. I will try the smoke trick and see what it says. Is that a good indicator of headspace or should I get that checked as well? I like that they left the original proof stamps on it.
I was lucky enough to pick up this rifle recently, I don't think the lady who had it even knew her husband owned it. Any info that anyone can provide is greatly appreciated.
I have found little info on this disc, is this a unit tag or something else?