Yes, these are actual test proofs. Of course the 15 TONS PER ?" is just a shorthand notation for a pressure of fifteen tons per square inch. I believe the "X" expression is a notation for burst pressure for overloads. And lastly, the Crown/BNP is for British Nitro Proof which indicates that the weapon has been tested in accordance with the 1954 proof law.
__________________
If it's made after 1918...it's a reproduction
|