You will have to call Colt to find out
The government issued Colt with that serial number was manufactured by Colt in 1942.
A Colt Python serial number 35128e was manufactured about 1964
Colt 1911 .45 serial # 171885 was manufactured in 1917.
You will have to call Colt to find out.
Proofhouse.com has Colt sn data
1943 by colt
You will have to call Colt and tell them the serial number.
If that is the colt combat commander, it was manufactured in 1962.
It was manufactured in 1944.
The Colt 1877 lightning with that serial number was manufactured in 1888,about 121 years ago.
made by colt in 1943
made by colt 1918