Proofhouse.com has sn tables you look up
To determine the year of manufacture for a Colt 1911 .45 based on its serial number, you'll need to reference Colt's serial number charts. The Colt 1911 was produced from 1911 onward, and the serial numbers were assigned sequentially. For example, serial numbers starting with "C" typically indicate a production year in the 1940s. For a precise year, consult a detailed Colt serial number lookup or Colt's records.
Proofhouse.com has Colt serial numbers you can look up
Take your pick. Various Colt serial numbers and dates.cut & paste http://www.proofhouse.com/colt/index.html
go to proofhouse .com and click colt serial numbers,this will tell you the age of your colt.
is that four numbers or five numbers in serial number ?????
You will have to call Colt. Published serial numbers stop at 1978
The Colt model 1911 commercial .45 with serial # 70G67301was produced in 1974.The serial numbers in 1975started with 70G73001.
Go here - http://proofhouse.com/colt/index.html
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.
Around 1916
The Colt Lawman MK III revolvers were produced from 1972 to 1986. To determine the specific year of a particular Colt Lawman MK III, you would need to reference the serial number against Colt's production records or use a Colt identification guide, as the serial numbers were issued in a sequence that can help pinpoint the manufacturing year.
Made in 1951 - There were 8,011 made that year, serial numbers #62,629 - #70,639