B'ham marks in context

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Brittish Proof

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Birmingham proof in context

Period

Marks

 

1813-55

 

 

 

1855-68

12

First period where caliber is marked. Normally plaved between Viewmark and Definitive proof mark.

 

1868-75

or

 

12

 

 

 

 

 

1875-87

or

 

 

or

12

 

 

 

 

 

 

 

 

1887-96

or

 

 

CHOKE

 

 

 

 

 

 

1896-1904

or

 

 

NITRO PROOF 1 1/8 oz Max

CHOKE

 

 

 

 

 

 

1904-25

or

 

NITRO PROOF 1 1/8 or 1 1/4 oz

2 1/2”

CHOKE

 

 

 

 

 

1925-54

NITRO PROOF 1 1/8 oz Shot

CHOKE

 

 

 

 

 

 

1954-89

 



900 kg

.729

2 1/2”

65 mm

 

 

 

 

 

 

1989-2005

 

 

12

65

850 bar

18,5 mm

 

 

 

 

 

2005->

 

 

LINED

CIP Steel symbol

Supplementary Proof at 1200

Ordinary proof at 850

Addition to sleeved since this new mark is a update to current technology

 

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Last updated: 2009-12-06