M1 carbine magazine questions

[Paul G]

Hello everyone,
Would a Winchester made carbine have come from the factory with a Winchester made magazine? Is there such a thing as a Winchester made magazine? Or, did that get farmed out to another company? If there are Winchester made magazines, are they marked? If so, with what? If there is such a thing I am looking to buy a few .Thanks alot, and sorry for all the questions

PG-

[SMG]

IW,SW,BW, IW in a circle,UW . i would say they were shipped with the carbine as were the other spare parts that were required to be shipped with the carbines as well. BUT there is some conjecture that they weren't shipped with the carbine but if that is so, WHY would each manufacturer have magazines coded specific to them? so i'll say yes then once in the field you got what you were given didn't matter who they were made for.