A diamond and emerald butterfly brooch, retailed by Mappin Brothers, circa 1911, each wing closed-set with a butterfly wing, the body designed as four graduated circular-cut diamonds to the head set with a rose-cut diamond and emerald eyes, engraved to the reverse 'brevete dans tous les pays' (patented in all the countries), maker's marks, mounted in 15 carat gold, London hallmarks, 1911, fitted case from Mappin Brothers, 220 Regent Street, London, W, width 6.0 cm