That first character is a 'G' not a '6'. After the Gun Control Act of 1968 passed, Winchester started marking the G prefix on the Model 70 rifle. Yours is very early, and if you look you should notice that the G will appear to have been stamped using a hand die instead of the roll-die used for the rest of the serial number. Winchester had receivers already manufactured and roll-marked awaiting assembly when the decision was made to start using the G, so they went back and handstamped those receivers. You could reasonably state 1967 OR 1968 as the year of manufacture. I just recently sold a 7mm Magnum Model 70 in the same model year for $355.00 (90% condition). sales@countrygunsmith.net
The MSRP on a new one is $1009.00
A Winchester model 70 rifle produced in 1968 will bring between 300-450 dollars depending on the overall condition of your rifle,and a good bore.
Your question has used the serial number of your Winchester,not the Model number.Please include a description of your Winchester along with the model number,and the serial number to get a answer about your Winchester.
With the serial number that you provided,your winchester model 12 shotgun was made by winchester in 1927.
With the serial number that you provided,your winchester model 1894 rifle was made by winchester in 1913.
With the serial number that you provided,your winchester model 70 rifle was made by winchester in 1970.
If you are asking when it was produced?Then your Winchester model 61 was made by Winchester in 1953,with the serial number that you provided.
Imposable to answer without you providing a serial number to your Winchester model 12 shotgun.
Your Winchester model 64 was produced from 1933-1957,and the serial numbers were listed among the model 1894 serial numbers.Your Winchester model 64 was made by Winchester in 1934.
Model 70 winchester serial number 432523 chambered in 416 rigby
While the Winchester model 190 was serial numbered,Winchester did not keep records of the serial numbers by year of production.I can say that the Winchester model 190 was produced from 1974-1980.
Your Winchester model 1894 rifle was made by winchester in 1971,with the serial number you provided.