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proof marks


hankook1
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The BNP surmounted by a crown is the Birmingham definitive nitro proof mark.

The `SUP` surmounted by double crowns is the Birmingham superior definitive proof mark for high performance steel shot, this mark was in use

between 2006 & 2013; replaced by a CIP mark in around 2014.

Edited by JJsDad
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Guest cookoff013

The BNP surmounted by a crown is the Birmingham definitive nitro proof mark.

The `SUP` surmounted by double crowns is the Birmingham superior definitive proof mark for high performance steel shot, this mark was in use

between 2006 & 2013; replaced by a CIP mark in around 2014.

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