it is a Mossberg
Depends on which model/manufacturer.
Mossberg and sons is the manufacturer of your western field model M550ABD,shotgun.The Mossberg model 500 is the same shotgun.
Give more info (model number) and ask again.
Mossberg, it is their M#85 ( I'm assuming that this is a bolt action shotgun).
Go to Numrich Gun Parts Corp.It will be helpful if you know the original maker of your shotgun,as all guns that were made under the Western Field name(Montgomery Wards) were made by outside firms for Montgomery Wards.If you list the model number of your western Field shotgun,this can be cross referenced to the original maker and help you get the right model of shotgun to locate parts.
I dont show that in my cross-reference. If you can send a digital picture, we can ID it for you. email@example.com
Trade name used by Western Auto Stores. Proofhouse.com has a cross check list.
Your western auto model 312AA shotgun was made by mossberg for western auto.The mossberg model 395,395K are the mossberg model designations for your shotgun.
I believe that the original manufacture was done by Mossberg and sons.It could be 2 different models thou.If your shotgun is a 2 shot and has a 2 3/4in chamber ,then it is the model 190 series of shotgun that was made from 1955-1958.If your shotgun has a 2 shot detachable magazine and 3in.chamber then it is a model 390 series which was made from 1971-1976.I hope that you find this informative.
Your Western field shotgun is a Mossberg model 385K shotgun that was made for the Montgomery Wards company by Mossberg and sons.The model 385K shotgun was produced from 1960-1986,These bolt action shotguns are valued at between 75-110 dollars,for a gun with between 60%-90% of its original finish remaining and a good bore.