You will have to call Colt to find out.
Can't find a serial number listed for combat commander starting with fos.
Colts serial number database lists only the Combat Commander, and they have no serial numbers that begin with "CJ", though for a number of years the Combat Commander had serial numbers that began with "CL"
What is the production year of a colt combat commander with serial number 70sc5572? Early 1972.
your colt combat commander was made in 1972.
That Colt combat commander 70BS69785 was produced in 1978.
Your Colt commander was made in 1977.
1976
1979
Colt combat commander with that serial number was produced in 1968.
1978
1978
1978