One of the following:
1950 POLICE POSITIVE SPECIAL & DETECTIVE SPECIAL
1950 OFFICERS MODEL SPECIAL
1941 1903 HAMMERLESS .32
1929 OFFICIAL POLICE MODEL (CONTINUED ARMY SPECIAL SERIALS)
1927 ARMY SPECIAL & OFFICERS MODEL
1918 MODEL 1911 MILITARY
colt fronter six shooter serial # 1186654
A Colt 1903 hammerless .32 with that serial number was made in 1919.
The Colt 1911 government model with that serial number was made in 1919,
Your colt was made in 1966.
Colt single action army with that serial number was made in 1910
The government model with that serial number was made by Colt in 1944.
A Colt challenger with that serial number was made in 1952.
A Colt police positive .22 with that serial number was made in 1914.
The records I have show a Colt Cobra with that serial number made in 1974.
You must call Colt with the serial number to find out.
Your colt trooper was made by colt at the end of 1968.
A Colt 1911 government model with that serial number was made in 1917.if you are talking about a colt single action revolver than it was made in 1894.