March 19th, 1997
No way to answer without the serial number.
Check the date stamp on the barrel. The table look and details are on the manufactured date link of the Remington Society of America.
They have date code stamps on the barrel which can be looked up on the manufacture date link on the Remington Society of America.
about 1960
the year of manufacture is now still unknown.
You will have to call Colt.
1951
You will need to call Glock
1955
1950
@ 1970