I recently purchased a Nobel Model66j in near mint condition for only $150. So to answer you question, value may range from $125 to $175.
This model was made by Noble Arms Co. and was based on their model 60-66 which was a pump shotgun.
50-150 dollars is the going price for a Noble shotgun.
Between 90-150 dollars.
The Noble firearms company made this shotgun.It was the Noble model 50.
50-150 USD
If you don't have an owner's manual, take it to a gun smith.
Check the receiver and barrel.
135.00 $
your Western field model 60 shotgun was made by Savage arms for Montgomery Wards(western Field).The Savage model 620A and your shotgun are one and the same.If you go to Savage arms home page,they may be able to say when the model 620A shotgun was produced.
I suspect it is a Noble pump action model 60 or 66.
$50 in good condition
you may find some info at the savage arms website.This was the maker of your shotgun,savage/stevens.