How do I date a winchester rifle for verifacation of age

I would first recommend that you go to Winchester's Website for info on locating the serial number for your rifle. There are a number of sites that you can visit -- Ace
Gallery of Guns.com - Gun Gallery, Ruger Firearms, Shooter Online Services, Firearm Industry News, Firearm Dealer, Gun News Centerfire
Winchester Rifles & Shotguns --- SXR Line