12C inside the device and 1&1/8" oz proofs, it was a 2&1/2" gun originally. If it was a 2&3/4" gun it would be marked 12LC inside the diamond or 1&1/4oz proof, possibly both.

Ed is always good for a laugh.

It most definitely matters what your gun was originally designed to shoot and how it was proofed. Those of us that have bought, sold and collected vintage British guns know that....and then there is Ed.

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