A Colt 1908 hammerless .25 with that serial number was made in 1914.
@ 1972
@1914
The caliber should be marked on the slide.
Around 1972 or 1973
somewhere around 1973
@94 yrs old
value depends on overall condition.....
about 1920 the value would depend of overall condition of pistol.
any single or double action semi-automatic pistol listed as a 40 caliber pistol...............
Caliber .45 Automatic Colt Pistol.
There have been several that fit that description.
It sounds to me that you have a Model 1908 hammerless model in .25cal.your serial number would indicate that this pistol was made in the year 1919.