What is the age and value of a Winchester model 670-270 serial number 112671?

As far as I know Winchester did not keep records of the model 670 and 670 Magnum series rifles.I can say that the model 670 was made from 1967-1973.The model 670 rifle will bring between 140-300 dollars depending on overall condition,with 300 quoted as a perfect unfired rifle.