Not sure about the "g" but the actual numerical number would put the manufacture date at 1949
Go to Proofhouse.com and look at the Winchester sn data.
Impossible to answer without the serial number.
By the serial number.
Post 81.
With the serial number that you have provided,your Winchester model 70 rifle in .308 caliber was made in the first part of the year 1982.
Without a serial number there is no way we can tell you. Get the serial number, contact Customer Service at Winchester.
That serial number dates to 1953, however the 338 Win Mag was not introduced unitl 1958. Looks like it has had the barrel replaced.
Check the barrel and receiver.
What is the age and value of my Winchester model 70 264 win. mag super grade? Serial # 703942
Your serial number indicates that your Winchester model 70 was made in either 1983 or 1984.
Your Winchester model 70 was made in the year 1976 with the serial number that you provided.
With the serial number that you have supplied,your Winchester model 70 rifle was made in the year 1990.