You will have to call Colt to find out.
Sometime after 1951 .
1966
1953
Made in 1950.
Late 1980s or early 1990s
Your light weight commander was produced in 1978.
1968
Produced about 1950.
Made in 1970
1968
If it is CLW0037116,it was after1978
The records I have show a Colt combat commander with serial number CLW0015879 as being produced in 1972.