Savage and Stevens depending on when and who they were made for. By far the most Western Field models were made by Mossberg with Stevens/Savage a distant second. There are also several by Marlin and Nobel, a couple of Colts, at least one Remington and a Kessler in the Blue Book's store-brand list.
Wester Field did not make guns, they sold guns manufactured by Marlin, Winchester, Hi Standard, and others through the 1970's.
If it was manufactured prior to 1968 it probably doesn't have one.
Western Field model m5500 20 ga was manufactured by Savage Arms
A variety of manufacturers made guns that were sold under the Western-Field label or brand.
Western Arms was a division of Ithaca. These guns were manufactured between 1929 and 1946.
I owned a 1967 Western Field Tent trailer and the one I owned was manufactured by Ajax Mfg or Welding in Iowa. Good luck in your seatch.
Stevens.
Western Field was the name brand used by the Montgomery Ward company for their line of sporting goods including guns. Since Montgomery Ward didn't manufacture guns, they pruchased guns with Western Field markings from several gun manufacturers incuding Winchester, Savage, Mossberg, Marlin, Remington, and Colt, to name a few.
Bruin
The Western Field 47 is a Mossberg model 45A and was manufactured in 1937 and 1938 only.
The Western Field model 550C was manufactured by Mossberg for Montgomery Wards.
A Wards Western Field Model 41 is a 22-caliber rifle. It was actually manufactured by Mossberg, but intended for Wards. Manufacturing took place primarily from 1935 to 1939.