Although many Western knives were used during WWII, most of them were purchased by the government from Western or various wholesalers rather than being produced on contract. (The Paratrooper model was one exception to this.)
Basically, some unit or branch of service would have a need of knives, and an order would go out to purchase X amount of "5 inch hunting knives" or whatever. The supplier filled the order with what was available (Westerns, Camillus, Remington, Robeson, etc). The guy who actually got the knife may have been issued a Western, but it was a knife produced for the commercial market. Some were blued, some were bright.
The early knives weren't really standardized as much as, say, the later Mk2 "KaBar" or M3 "trench knife" were. The USN MkI was just a 5" hunting knife, from a variety of makers; some were marked USN MARK I, and some just had the commercial markings.
If you're buying a blued Western, keep in mind that Western used a hot blue, not a rust blue or a cold blue. If the blade smells like copper, it has been refinished with cold blue.
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