Picked this up in 1975. From what I see on the boards and aution sites, I was wise to keep it. Note the overstamp from 4 to 7 on safety and bolt to match serial # on reciever. Has anyone ever seen a correction like this? Floor plate eagle 135, barrel waa 823, bnz 1 in shield. Mod 98 on left side reciever. Can't seem to find any stock proofs. Did this year sport any?