Ruger website, under customer service, historical information, select your firearm, and there is a year of production table.
Serial number shows it is a single action revolver made someime after 1978.
1927
1962
1895
depends on the model revolver. single action just in front of trigger guard............ modern revolver bottom of butt............
1959
1897
about 1907
about 1880
1910
1970
1877 if it's a Single Action Army. Nothing special about the serial number.