try: SAVAGE SHOTGUN.COM
Springfield Arms shotguns were manufactured by the Stevens division of Savage Arms from 1920 to 1948.
Built c. 1930-1948 by Stevens division of Savage Arms. If in useable condition, possibly worth $200+.
Savagearms.com
savage,springfield arms co.
All of Gambles shotguns were made by Savage arms Company with the exception being the model GU-12-5517A which was made by J.C.Higgins.
Beebe shotguns were made by one of two two manufacturers. Harrington & Richardson Arms Company made them from 1871 to about 1975. Hopkins & Allen made shotguns from 1868 to 1915.
Savage Arms is the manufacturer of Springfield Shotguns.
ESSEX Tradename used by Belknap Hardware Company of Louisville, Kentucky on shotguns made by Crescent Fire Arms Company. ESSEX Tradename used by J. Stevens Arms Company on rifles and shotguns.
Model 520 shotguns are selling, depending on condition, from $100-$200. sales@countrygunsmith.net
1930 - 1949
I can't find a cross-reference for that number, but Eastern Arms was a trade name used by Sears Roebuck. Most of the shotguns were made by Stevens/Savage.