Found this on an old post on Rimfire central. It would appear yours is pre 1960 and probably pre model 64 designation.
“
The catalog description of the KK Junior, 1402, early 1403 and possibly the early SA 64 was "The Anschutz Model (KK Junior, 1402, 1403 etc) Junior Match Rifle is the first truly match grade rifle yet produced for youthful shooters or adults of small stature"
I do not know exactly when these models started but the KK Junior was up to the early 60s, the 1402 from early 60s to mid 60s, the 1403 and SA 64 mid 60s onwards. The CIL 190 in Canada was a slightly lighter version of the SA 64 from the mid 60s to, I think, sometime in the 70s when it went back to being a 1403.”