I have a mint condition made in Japan Sightron Big Sky II 3-9x42 Duplex reticle scope model 20003. This was mounted on a rifle years ago and shot at the range a half dozen or so times. Has been stored in a climate controlled safe in my home since with a scope cover on it. Glass is in pristine condition. You can lightly tell the scope was mounted where the ring was. It was tightened to spec with a torque screwdriver when mounted. Scope works wonderfully and adjustments are perfect. Shipped for $250.