If it is a Colt 1908 hammerless .25, then it is about 78 years old. It would have been made near the end of 1932 as the year 1933 started with serial number 395000.
about 1919
about 1936
about 1921
about 1926
1937
@ 1912
made 1924
The caliber should be marked on the slide.
Made in 1909
1909
It's a 1970
1916