I have something that says J frames with SN's J1-J99999 were made from 1969-1970, but it specifies for Models 36,37,38,49, and 50.
Same source says SN's 7369-21342 were made in 1952, but it lists the same Models as above.
If yours has the original grips, and the screw holes are in a diamond, that means 1968 at the latest which might make yours a 1952 if 108xx is the SN.