this is not a food question sir.
Virtually impossible to determine caliber by just the serial number.
Basically impossible to do with just the serial number.
You will need the services of a good gunsmith.
In order to get a accurate value for the rifle in question,you will need to add the model number of the rifle,and the overall condition of the rifle to your question along with the serial number.
The numbers .308 are the caliber of your rifle,not the model number.Please include the model number and serial number to get the age of your Winchester rifle.
Impossible to answer with the maker's name and the serial number.
It is impossible to do with just the serial number.
With the serial number that you have provided,your Winchester model 63 rifle was made in the year 1948.
Impossible to value a weapon with just the caliber and serial number to any degree of accuracy.
1974.
Rifle? Handgun? Caliber? Maker? Other markings?
Caliber, maker, serial number, proof marks, etc..