明末清初 十七世紀 掐絲琺瑯饕餮螭龍紋出戟仿古方觚

For similar examples of cloisonne gu with taotie masks, see Helmut Brinker and Albert Lutz, Chinesisches Cloisonne Die Sammlung Pierre Uldry, Museum Rietberg, Zürich, 1985, no. 178 and 212 ; Palace Museum, Compendium of Collections in the Palace Museum: Enamels, Vol. 2, no 36, pp. 62-63.