No sn data published. Probably 30-60's or so
@ 1866.
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.
Old catalogs
made about 1918
It was made in 1864.
no published sn data.
You will need to start by contacting Mauser
100-300 USD
If it is a Colt Vest Pocket model, 1921.
About 1914. Go to proofhouse.com to look up.
if it's a 380 caliber then made about 1924
About 92 years old, made in 1917.