Try Proofhouse.com
proofhouse.com
Men's pocket watch serial 1009277 how old
Blue Book of Gun Values.
Proofhouse.com has sn tables you can look it up on.
You will need to find a copy of the SCSW
yes
Colt factory: 1 800 962 2658............
By calling or writing to Colt Mfg. Co,. in Hrtfd,CT
The Ruger website lists historical data for their firearms, under customer service.
If you are looking for the serial number and can't find one, then there most likely is not one. For a time Benjamin did not put serial numbers on their pistols. I also own a Benjamin that has no serial number and had to do some research to find this fact out. Reference: "Blue book of airguns"
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.
Find a book or website that has sn data for it and look it up