Are all S&W magazines marked as such, or are some non marked? terry

Not all factory S&W magazines were stamped with the trademark - attached shows early and later 3913 magazines.

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I have a mix of marked and unmarked magazines. I probably have more that are unmarked. I think those are earlier production. I have three black non stainless 3913 magazines and none of them are marked.

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Can open, worms everywhere.

i can't say it applies to all of the non trademark stamped mags but i've seen factory mags that are just stamped with an "s"