First, this isn't my rifle. And, the photo is not pretty, at all, IMO!
I've offered to give it a once-over and "help him clean it up a bit".
Someone near me asked about this rifle. Apparently it was from an older family member.
Anyways, what is the "E" on the receiver ring? If this is an M1917-101 level question, y'all please humor me and use little words!