1965
The only way to know is to ask him or one of his relatives.
The Colt Challenger pistol with the serial number 2391-C was manufactured in the early 1950s. Colt typically produced the Challenger line between 1950 and 1956, making it likely that this particular pistol was made during that timeframe. For a precise manufacture date, consulting Colt's production records or a Colt historian would provide the most accurate information.
In 1957 for 119033-C
Would need model name to answer or go to proofhouse.com .
about 1953
1952
Black Rifle II by C. Bartocci has what you are looking for
The Army model without the prefix C was made in 1944. There were none with the letter C for commercial model with that high a serial number.
there are too many numbers in the serial number of the first pistol. On the second pistol is the prefix 'CP' or just 'C' ????
value depends on overall condition. serial number will tell you the age.
John C. Colt died on 1842-11-18.
John C. Colt was born on 1810-03-01.