Try these sites: Numerich gunpartscorp.com
Jack First jackfirstgun.com
Bob's Gun Shop gun-parts.com
Serial number data not available
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.
Resources to do that are available only to law enforcement.
What's the year of my Stevens? Serial number p116495
No sn data available
No sn data available
No sn data available
The lower the serial number the younger the pistol is
The PY in the middle of your serial number dates your pistol to 1982.
Impossible to answer without knowing who made it. Even then, the data might not be available.
The stevens Model 35 offhand shotgun(even though it is listed as a pistol) was made during the years 1923-1935 in .410 gauge.I do not have a model production breakdown by years with serial numbers though.Maybe savage/stevens might have more info at the savage arms web site?It would be worth a try.
with a serial number of E261611