Note: This vase is extremely rare for its elegant hexagonal form and no other related example appears to have been published. Compare a vase of similar form, but with tubular handles and decorated in enamels with rocks and bamboo in the style of an ink painting, with a Qianlong reign mark and of the period, from the Sir Percival David Collection in the British Museum, London, included in the travelling exhibition For the Imperial Court. Qing Porcelain from the Percival David Foundation of Chinese Art, Kimbell Art Museum, Fort Worth, 1997, cat. no. 18.