We cannot tell without the serial number. However, you can contact Winchester customer service through their website.
Serial 3910589 was manufactured circa 1973, and its value is somewhere between $100 - $200.
A250644
With the serial number that you have supplied,your Winchester model 100 was made in the year 1966.
100-1000 or more depending on specifics
Your serial number indicates that your Winchester model 100 semi-auto rifle was made in the year 1967.
your Winchester model 100 semi-auto was made in 1965.
Serial number.
With the serial number that you have supplied;your Winchester model 100 semi-auto rifle was made in the year 1963.
Check the receiver and barrel.
With the serial number that you have supplied,your Winchester model 100 semi-auto rifle in .308 was made in the year 1961,which was the first year of production.
Your Winchester model 100 semi-auto rifle was made at the end of the year 1967,with the serial number that you supplied.
It was made in 1972