If it is marked "J. Stevens Arms & Tool Co" it was made between 1886 and 1916 when "Arms & Tool" were part of the company name. Value will depend on the configuration and condition. Side hammers usually go as mantle decorations, especially if they have damascus barrels ($75 for single shots, $125-$150 for double barrels). Boxlocks (back hammer or hammerless) in good shape can bring $75 (single) to $250 (double) as shooters.
$50 in good condition
1930s
I can say that the marking stevens Arms and Tool company was marked on stevens made firearms from 1886-1915.This time period would include your double barrel shotgun.As to value that would dpend on your shotgun having steel barrel or Damascus twist steel barrel(BLACKPOWDER ONLY).The ovreall condition would also be important.
Probably $50-$75.
50-100 USD, seldom any more than that.
I can say that your shotgun being marked with J Stevens Arms and Tool Co.indicates that it was made from 1886-1916.That marking was only used during these years of production.
150-600as new
Have it examined by a gunsmith.
Impossible to answer without more information.The manufacture date can be approximated by the company name.J Stevens & Co = 1864-1886J Stevens Arms & Tool Co = 1886-1916J Stevens Arms Co = 1920-late 1940sStevens = 1940s-1990
I recently acquired a J. Stevens Arms and Tool Co. Mod 520 12 Gage with Browning Pats # Feb. 7-1905, Aug. 27-1907, Some gun enthuse that I have spoken with say it is not worth much more than $150.00, it
How old is the gun
Depends on model and condition. Anywhere from $75-$250.