Recently picked up a rifle with what I am assuming is a Weaver scope. It is probably close to 30 years old. Has Micro-Track under one turret. It apparently has a range adjustment utilized by turning the front bell to the appropriate yardage. It is a 3x9. There is nothing other printed on the scope that I could find to identify it with. Any ideas if this is indeed a Weaver and, if so, what model?