1955 (first year of production).
1962
your Winchester model 70 was produced in 1968.
With the serial number that you have supplied,your Winchester model 9422M in .22 WMR caliber was made in the year 1974.
The gun was made in 1956
Proofhouse.com has sn data.
You will have to contact Winchester.
@ 1954
what year was my Winchester M1 carbine serial number 1210906 manufactured
Your Winchester was manufactured in 1952.
Winchester Model 94 serial number 1237317 was manufactured in the year 1940.
Your winchester model 9422 was made by winchester in 1975 with the serial number that you provided.
Virtually impossible to determine caliber by just the serial number.