Janssen Fils & Co was making guns from 1895 to 1965. Since yours is marked in English (Sons instead of Fils) it was made for export to the US and the mass import of shotguns from Belgium was cut off by WWI and never resumed after, so it's a pretty good bet that yours was made between 1895 and 1914. Value will be determined by how nice it looks over the mantle, usually $150 to $250.
it is a Stevens, parts are interchangeable...
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Made in Belgium by Simonis, Janssen, Dumoulin & Co. c. 1884-1905
There have been several variations of Janssen shotguns. Large gunmaking family in Belgium. J JANSSEN shotguns are typical hardware-store imports that top out at $250, but JANSSEN FRES (for example) can bring several times that.
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Depends on the condition.
Manufactured in Belgium by Simonis, Janssen, Dumoulin & Co.
Janssen Fils & Co if it has Belgian proofmarks or Crescent Fire Arms Co if it does not.
double barrel shotgun
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