A Colt 1908 hammerless .25 with that serial number was made in 1920.
If it is a Colt 1908 hammerless .25 with that serial number, it was made in 1912.
Without the serial number the quesiton can't be answered. Call Colt and they will tell you.
1921
about 1908
1908,
A Colt model 1908 hammerless .25 with that serial number was produced in 1917.
A Colt 1908 hammerless .25 with that serial number was made about 1912.
A Colt 1908 hammerless .25 with that serial number was made in 1914.
A Colt 1908 hammerless .25 with that serial number was made in 1912
1917 for the Colt model 1908 hammerless .25
The Colt model 1908 hammerless .25 with that serial number was made in 1909