@ 1970
1970
S&W will tell you if you call them.
Impossible to answer without the serial number.
made about 1962
Need a detalled description of all markings
1951
Without serial number, between 1966 & 1988.
Must know who made it and what model.
Call S&W and they will tell you when it left the factory. It could have been made anywhere from a week to a year before.
You must call S&W to find out.
about 1961
CTG stands for Cartridge