I can say that the stevens modl 94A was made from 1926-1945,with a total production of 934,000 guns made during that time span.That is the best that I can do.
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.
Springfield Arms shotguns were manufactured by the Stevens division of Savage Arms from 1920 to 1948.
This name was used by Montgomery Ward on guns manufactured by Iver Johnson Arms and Cycle Works and J. Stevens Arms Company.
Eastern Arms was a brand name sold by Sears Roebuck. The Model 1929 suggests that it was made by J. Stevens Arms Co.
Look on the top of the receiver with the gun disassembled. You should find it there.
try there web site or google, if you cant find anything take it to a trusted gun dealer, or buy a book about Shotguns, or guns in general
Trade name used by J Stevens Arms Company on shotguns it made. Value seldom exceeds 100 USD
Riverside was an 'economy' brand used by the Stevens division of Savage in the 20's and 30's.
The 238 is similar to the 258. For parts, try gunpartscorp.com
try gunparts@hsnp.com
Riverside Arms is a brand name used by the J Stevens Arms Co. on many good quality shotguns. The value depends on model, gauge, and condition. There is little collector interest in single barrel shotguns. Information about J Stevens Arms apply to Riverside Arms Co.
Try looking it up in the" 2008 Firearms the collectors price & reference Guide" in the Library. Pages 1137 to 1140. You will have to find out what model you have by compairing the photos with your shotgun. This should give you an idea of the value.