1920
Stevens was in business from 1864-1950. They did not have a "pocket pistol" model, but DID make a "pocket rifle" model from 1869-1916. Am aware of no specific production data based on serial numbers.
A Colt model 1903 hammerless .32 with that serial number was made in 1907.
$200-$300
Colt model 1903 hammerless .32 with that serial number was made in 1931. About 78 y.o.
serial #9019268, #1 oresilver, 15 jewel pocket watch, american waltham watch co.
100-300 USD
If it is a Colt Vest Pocket model, 1921.
I find 1909 for a Colt 1903 pocket model .38
I found a 1903 hammerless .32 with that serial number made in 1925.
The Colt pocket model 1908 hammerless .25 # 232265 was mfg'd in 1920. (232000-280499) if 25 cal......made abut 1920
if it's a 380 caliber then made about 1924