1977
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.
The number on the butt is the serial number. The serial number will allow you to date it.
Can't tell model number from just the serial number.
@1969
What is the manufactures date on an Iver Johnson revolver serial # Q18255
You did not list the serial number. The serial number should follow this example - CCB8765
1970
1959
No sn book on this weapon
@1957.
1929
1963