Are you sure it says ARMORY and not ARMS?
It was disc.in 1989
Savage Arms is the manufacturer of Springfield Shotguns.
Springfield was a trade name used by Stevens/Savage c. 1920-1945. No relationship to the current Springfield Inc or the US Springfield Armory. What you have is a Savage Model 720 built under license from FN (Browning) They where also made by Remington with the Model 11 designation.
Springfield Arms shotguns were manufactured by the Stevens division of Savage Arms from 1920 to 1948.
The Savage model 312 is an over under shotgun that Savage imported from Italy from 1990 through 1993. The shotgun was manufactured in northern Italy in the Gardone region.
It doesn't have one. Long arms manufactured before 1/1/69 were not required to be serialized in the US.
First you have to determine what kind of "Springfield" you have. It could be a US military arm from the Springfield Armory dating to sometime before the Civil War or a new sporting arm from Springfield, Inc., but most likely it is a shotgun made by J. Stevens Arms or the Stevens Division of Savage Arms.
You'll only find the date of sale if you have the original cash register receipt. Springfield shotguns were manufactured by the Stevens division of Savage Arms from 1920 to 1948.
http://www.e-gunparts.com/dept.asp for parts I have one, manufactured in the '70s by Savage Arms. Approximate value is 140.00 - 180.00 USD.
Savage began producing the Springfield Model 67 in the 1950s. It was a pump action budget grade shotgun that ceased production in 1989.