Here we have an example of a Derfield's "Green" Pipe, and two others. The box indicates London Made, apparently with a hand-cut vulcanite mouthpiece. Manufactured by Derfield & Co., LTD, 20/21, Burlington Arcade, Piccadilly, W.I.

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Courtesy Doug Valitchka
Examples from an eBay listing, Top: #D36; Middle: #377; Bottom: #75