The records I have end in 1978 starting with SA 01001, so it would seem to be a few years after that.
Serial number shows it is a single action revolver made someime after 1978.
1927
1895
1962
depends on the model revolver. single action just in front of trigger guard............ modern revolver bottom of butt............
1959
1897
and the model is..................................
about 1880
about 1907
1970
1910