Proofhouse.com has Colt sn data.
By model and serial number. Go to proofhouse.com
1912
1910
1911
2006
1871
probably WW1 era.................
1919
Just saw a site saying a serial number 88000 was manufactured in 1916. So it may give ya an idea.
If you are asking about the location of the serial number of the Colt commando revolver, it can be found by opening the cylinder and looking at the crane or frame at the swivel. It would be in two places back to back.
No known sn data published.
No published sn data I am aware of.