Colt, made in 1919
A Government Colt with that serial number was made in 1919 in a Colt factory.
You will have to call Colt
You will have to call Colt with the sn to find out.
Proofhouse.com has Colt sn data. That prefix was put on pistols made between 1981 and '83.
It is not stainless steel. My guess is that it was nickeled after it left the factory. A factory nickel piece from 1918 needs to be lettered by Colt.
your colt model 1911 was made by colt in 1913.
The colt 1911 fires .45ACP ammunition.
Your colt 1911 was made in 1924.
The Colt 1911 was designed in 1897 and adopted by the US Army in 1911.
By studying the books that have been written on Colt 1911's
With the serial number that you have provided,your Colt Model 1911 was made by Colt in the year 1918.
You can find a list of Colt M1911 and M1911A1 production serial numbers at http://www.coolgunsite.com/pistols/colt%20production.htm. Going by the numbers in your question (7071), it looks like you have a M1911 that was made for the Navy in 1912, the first year of production.