This is a Reilly hang tag from 1893 (probably Gene's)

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British service charges with the various powders after the 1896 Proof House revisions

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An 1896 Lancaster specifying “E.C.” (No. 1) 42 grains = 3 Dram with MAXm. 1 1/8 oz. shot

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I don't think this help continued after the 1904 Proof House revisions