I can say that with the markings of J Stevens Arm and Tool Co.your shotgun was produced sometime between 1886-1916.All firearms were marked so during this time span.There may well be no serial number assigned due to this not being required until the year 1968 with the adoption of the gun control act of that year.
$75-$200 depending on condition
Hopkins and Allen arms co. 12ga serial #5832006
What is the value of a remington 1100 12ga serial # l869590v
It is hard to tell what the value or the age of the Stevens 94C 12ga without knowing whether it has a serial number or not and the condition of it. If it does not have a serial number it was made before 1968 though.
10-100 usd
50 years old
Stevens 520A
made in 1968 2000$
Which model is it? The serial is not enough detail
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The model 9478 is probably only valued between $100 & $150 (U.S.) as for age I have a serial # of E4***** which I believe was purchased new in the winter of 1998 or 99 for me by my parents so with that in mind the D437*** was probably manufactured in the mid-1990's.
According to OldGuns.net, the year of manufacture for Winchester Model 1912 serial number 466271 is 1927. Not sure if this is your gun, or what the value is.