I picked up an ar/m16 scope with integral see though mount at a gunshow today. It in only marked 'Colt' with 'made in USA' under it. No serial numbers, no other markings. It has an inverted post reticule. It's clear, solid, and seems to adjust properly. Two questions for all the paragons of wisdom - when would it have been made, and what's an approximate current value. I'm mounting it and will try it out tomorrow. Incidentally how did it adjust? there is a small knob on the side I'd guess is windage. Outside of the range knob on top is there an elevation adjustment? Really appreciate my normal 'lurking' on this site.