Proofhouse.com has sn tables you can look at.
Proofhouse.com has Colt serial number tables.
Proofhouse.com has Colt sn data.
1966
Call Colt and they will tell you.
Your colt was made in 1916.
if your pistol is of the model 1911 with serial number 189558 then it was made in 1917 by colt. If it is the revolver then the serial number is to high for the 1917 revolver.
Proofhouse.com has Colt sn data.
Proofhouse.com has Colt sn data.
1959
and the model is..................................
about 1976
about 1919