look on the barrel of the rifle, It should be clearly stamped near the breach(the end you load from). Serial numbers are not placed on the barrel, since the barrel is removable and is not considered the 'firearm.' The true serial number of the firearm is going to be located on the receiver. You do not indicate which model Winchester, though. You should also understand that .22 rifles and shotguns made prior to 1968 were not required to be serialized, and some Winchesters therefore did not have serial numbers.
Contact Winchester with the serial number of the rifle
With the serial number that you supplied,your Winchester model 1894 lever action rifle was produced by Winchester in the year 1972.
What is the year of manufacture of Winchester model 94 rifle serial number 2359141
Buy providing the serial number to your Winchester model 71 lever action rifle.
top of barrel
1921
You will have to contact the Cody Firearms Museum to find out.
Buy supplying the model of your rifle and the serial number.
To find out how old a Winchester rifle is one would need to take the rifle to an appraiser or gun shop. The gun shop will be able to look up the gun by the serial number.
The G prefix to your serial number shows that it is a model 70 Winchester rifle.It should say this on the barrel of your rifle.
1958-61
If you would post the serial number and model number,I can give you a date of manufacture.