Proofhouse.com has sn data
Try gun shows, want ads, gun shops,.
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Try gun shops, gun shows, pawn shops, want ads.
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You can find out what year your gun was made by having an expert appraise the gun. You can also find out by finding the model number and contacting the manufacturer.
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It depends on what you want to find out.
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I would try the internet, gun shops, gun shows, want ads.
Old gun catalogs and Blue Book of Gun Values
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