This rifle was made by Winchester from 1963-1971.
Your Winchester model 255 was made from 1963-1971.winchester did not keep records of the serial numbers by year of production for the 200 series of rifles,which yours is.
Your winchester model 9422m .22 mag rifle was made by winchester in 1973.
Your winchester model 62 was made in the first year of production which was 1932.
With the serial number that you supplied,your Winchester model 74 was made in the year 1941.
The 7mm Ultra Mag is a Remington cartridge. THE model 70 is a Winchester rifle. Winchester does not chamber the Model 70 For the 7mm Rem. Ultra Mag cartridge.
With the serial number that you supplied,your Winchester model 94 was made in either 1971,or 1972.
Winchester Model 94-44 Magnum 3199687M
With the serial number that you provided,your Winchester model 9422M,chambered in .22WMR was made in the year 1973.
Proofhouse.com has Winchester sn data
Without a serial number there is no way we can tell you. Get the serial number, contact Customer Service at Winchester.
I can say that the Winchester model 670 and 670 magnum version,which you have was made by Winchester from 1967-1973.I am afraid thats all the info that I can find.