By listing your serial number,and the model number with the caliber your shotguns was chambered in.please include this in your question.
Stevens 320. Sn.172419m. Year made ?
The stevens model 77 slide action shotgun was made from 1955-1971.
your savage Stevens model 94c was made from 1926-1945,there were 934,000 made during this timespan.
The patent date you are looking at does not indicate a year of manufacture. Stevens made many different models of double-barrel shotgun. Which model do you have? sales@countrygunsmith.net
These shotguns were made from 1926-1945.Stevens did not keep records as to the year of production by serial numbers.
This Shotgun was made by Stevens their model. 520. Made from 1930's to 1950'S Although the shotgun was Browning patent marked, it was not made by Browning.
I can say that the Stevens model 67 was discontinued in the year 1989.
I can say that the stevens model 9478 shotgun was made during the years 1978-1985.
I show that the stevens/savage model 520 was made between 1912-1932 with the total production being 191,000 guns.I would feel safe in saying that yours was made in 1912-1913.
The Stevens model 311 was discontinued in the year 1989.You would have to contact Savage/Stevens to get the actual age of your double barrel shotgun.
These were made between 1936-1942.
Your Stevens model 235 was made between the years 1912-1916.This is when the Name Stevens arms and tool Co was changed to Stevens arms Co.The model 235 was made from 1912-1935.So the years listed fit into both the name and manufacturing time frame that your shotgun was produced.I hope that you find this informative.
While I cannot state the exact year of your Stevens model 520 production,I can say that this model of shotgun was made from 1912-1932.Stevens/Savage made 191,000 during these years