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Home
- About us
- Abbreviations
- Blog
- Contact
- Displays
- References
- Remembrance
- Research
  - Twenty Years After
- Safety
The Guns
In Use
Manuals
- General
- Weapons
Shop
- Accessories
- Books
  - Bundles
  - One-off or limited
- Clothing
- Manuals and Archive Documents
- Militaria
- Parts
  - Patrons Only
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Home / The Guns / Markings / Proof Stamps

Proof Stamps

Marking on right hand side plate. .303 2.222″ / BNP 18.5 TONS PER O”. Modern proof mark for .303-inch ammunition. From Birmingham Proof House. Pressure rated at 18 tonnes per square inch.

Marking on right hand side plate. DA / 91. Deactivated at London Proof House in 1991.

Marking on water jacket. DA / 86. Deactivated at Birmingham Proof House in 1986.

Sources

Goldsmith, 1994
Skennerton, 1988; 1997

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