Manufactured in 1970.
Colt gold cup national match .45 with that serial number was manufactured in 1970.
check with: felix@bedians.com
About 1969 with that serial number for a Colt goldcup national match .45
the colt national match series with NM after the serial number started in 1957. So your gun would have been made about or shortly after 1957............
The National Match series with NM in the number started manufacture in 1957. The serial number 17235NM was built in 1965
not sure of exact date but probably after 1956 in 1957 colt re-introduced the National Mach model with serial numbers 26-NM to 37025-NM
made 1914
Your gold cup NM was produced in 1976.
The sn you list is not on the NM list. You could have a NM upper on a non-NM lower. Call Colt or have it professionally appraised.
about 1962 In 1957 colt re-introduced the National Match model with serial numbers from 26-NM to 37025-NM
Colt data at Proofhouse.com
Sometime in 1969. If you call Colt's Mfg., Inc. and give them the serial, they can give you the specific date. They will do this over the phone, while you wait.