Colt army .45 with that serial number was made in 1944 by Remington Rand for Colt.
Colt 1911 .45 serial # 171885 was manufactured in 1917.
your 1911 serial number indicates your 1911 was made by Colt in 1914
The government issued Colt with that serial number was manufactured by Colt in 1942.
Your colt 1911 was made in 1924.
Your Colt model of 1911 dates to the year 1918,with the serial number that you have supplied.
The Colt government 1911 .45 with that serial number was made in 1944 by Remington Rand
By it's serial number.
don't find any 1911 45's serial number ending with a letter. ???
Manufactured in 1978.
Your colt model 1911 commercial (that is what the C stands for ahead of the serial number) was made by colt in 1917.
Your colt 1911 was made for the U S GOVERMENT in 1919.
if the military model, about 1918
made by Colt about 1916
it was probably made after 1957
made by Colt 1918....................
You must call Colt to find out.
Proofhouse.com has Colt serial numbers you can look up
Proofhouse.com has Colt sn data.