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.
@ 1912
about 1919
about 1921
about 1926
about 1936
1937
1909
1916
made 1924
Made in 1909
It's a 1970
The caliber should be marked on the slide.