there should be a stamp on the front of the trigger guard just above the hinge for the lever.
My guess is an "E" model. I think there is a site called "savage99.com" that gives references and dates of mfg.
I have the same model dated 1951. Awesome guns , mine is still really accurate with handloads, 3 shots 3/4" & 5 shots @1-1/4"