Thread: Parker 20ga VH with British proofs
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Unread Yesterday, 07:43 PM   #3
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David C Porter
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BNP= Birmingham Nitro proof. .615= Chamber diameter. Crown over BP= Black power proof. 2 1/2= chamber lenght. Diamond 20= 20 gauge. 3 tons/sq in= Proof test pressure. Crossed swords with letters= Birmingham inspector date codes.
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