A small number of Qianlong period flambé-glazed vases of this extremely unusual trilobate form are known. Compare one in the Qing Court Collection in Beijing illustrated in The Complete Collection of Treasures of the Palace Museum, Monochrome Porcelain, Hong Kong, 1999, pl. 183. Another was sold at Christie's Hong Kong, 30th April 2001, lot 718, and is now in the collection of Alan Chuang, illustrated in Julian Thompson, The Alan Chuang Collection of Chinese Porcelain, Hong Kong, 2009, pl. 66. A third was sold in our Hong Kong rooms, 27th April 2003, lot 246.