Western Field was a Montgomery Ward trade name. The guns were actually made by various manufacturers.
They were utility guns, and were usually a less expensive version of a gun the maker produced under his own name. Cutting costs involved cheaper stock wood, less quality polishing and bluing, cheaper sights, etc. Otherwise, the guns were no better or worse than the same model made under the maker's name.
They have little or no collector value and none (AFAIK) have ever been designated as C&R guns except by age. Many models have long been discontinued by the makers, and MW is out of business, so parts may not be available. Magazines, especially, are simply unobtainable for most of the bolt action shotguns.
If you provide full information on the MW model number, someone might be able to tell who actually made the gun.
Jim