So I have a Winchester Model 70 in 7mm Mag. I need to know if its a pre-64. I came across a site that will tell you the date by typing in the serial number, but I dont know the credibility of the site. The date came back as a 1958 model. I want to start building this rifle, so Im wanting some info on it before I start the build. I will take some pics and post them. The rifle is in VERY good condition. Its got a black synthetic stock. The serial number is G2321350