WINCHESTER ACCESSORIES NO FURTHER A MYSTERY

I’m in a small town 40min South of Denver, CO. I joined generally to find out more info on my father’s 1959 Design 70 .300 H&H Magnum. I don’t hunt, so I’ve only taken it target shooting to this point.I nonetheless have not had it towards the range. This is definitely on my temporary to carry out checklist. It's a Lyman peep sight about the