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Winchester Model 12 Factory Receiver Mark
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So Cal
WACA Member
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November 23, 2021
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February 21, 2024 - 2:12 pm
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I have a Model 12 16 gauge that has a “W” stamped on the lower receiver just forward of the carrier port, just aft of the magazine access / barrel lock up. 

Just curious what this might mean. I’ve checked old books, collectors sources, internet…no joy. 

Any ideas ? Thanks

Kingston, WA
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February 21, 2024 - 5:18 pm
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The “W” stamp on the receiver frame was a quality control test of the new Dulite bluing formula that Winchester had adopted.  Winchester used the “W” stamp for a 24-month time period beginning in February 1939.  It was used on many different models, both rifles and shotguns.

Model 12s

835304-W.jpgImage Enlarger838902-W.jpgImage Enlarger843296-W.jpgImage Enlarger939667-W-Skeet-Gun.jpgImage Enlarger




Model 97s

E908003-W-marked.jpgImage EnlargerE913661-W-marked.jpegImage EnlargerE913993-W-marked.jpgImage EnlargerE918212-W-marked.jpgImage EnlargerE919421-W-marked.jpgImage Enlarger

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