approximately 1979
You can look it up at Proofhouse.com
your colt combat commander was made in 1972.
Can't find a serial number listed for combat commander starting with fos.
Published data does not go that high. You will need to call Colt
Call Colt. The sn goes beyond published data that I know of.
That Colt combat commander 70BS69785 was produced in 1978.
What is the production year of a colt combat commander with serial number 70sc5572? Early 1972.
That would be 1977. 1978 Since 1977 started with serial number 70SC50201 and 1978 started with serial number 70SC57900 and the Commander in question is serial number 70SC57072, it would have to been manufactured in the latter part of 1977.per proofhouse.com
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"
Your Colt commander was made in 1977.
The best I can do is say that your colt Combat commander series 80 was made from 1983-1996.