The circled Savage Letter datre Codes were used from 1949 (A) to 1970 (X); but the Springfield name is still being used today on some store-branded guns by Savage (My then-new wife bought me an also-new Springfield .22 for our 1st Christmas in 1965); and since your gun has a SN on the watertable, it was made after the Gun Control Act of 1968 required it be placed on ALL firearms - something inconsistant prior to then.
There are NO public production records available from Savage - but ther IS a Savage Historian who may be able to find the production record for your serial-nembered gun (for a fee).
J. Stevens Arms Company Historian
Mr. John Callahan
P.O. Box 82
Southampton, MA 01073