You will have to contact Savage directly for the answer to your question.I beleive that the serial numbers to the Stevens model 311 side by side shotgun are not in the public domain.I can say that the model 311 was discontinued in the year 1989.
There is no website to determine the age of a Stevens 311 by serial number. However, since yours has a serial number it is almost certainly post-1968. sales@countrygunsmith.net
I purchased my model 311 back in 1968, as a used shotgun. I was told it was factory made with no serial number. I dont know mfg date, but this will maybe start you in the back dating process.
$250-$350.
there is the Stevens side by side shotgun model 311
The best that I can do is state that the Stevens model 311 side by side was discontinued in the year 1989.
1994
The Stevens 311 is a double barrel shotgun.
The original Savage?Stevens model 311 shotguns were made from 1926-1945.The more recent made Stevens model 311 shotguns were discontinued in the year 1989.
Not recommended.
Any firearm made prior to 1969 did not require a serial number by law.
About $300, depending on condition, barrels, etc.