A similar Qianlong-marked vase in the National Palace Museum is illustrated in Monochrome of the Ch'ing Dynasty, Catalogue, no. 74. Another Qianlong example was included in the Exhibition of Chinee Porcelain. The S.C. Ko, Tianminlou Collection, Hong Kong Museum of Art, 1987,Catalogue, no. 61
Cf. the Daoguang example from the Edward T. Chow Collection sold in Hong Kong, 19 May 1981, lot 549 and the pair sold in our Hong Kong Rooms, 17th January 1989, lot 651.
The Chinese University of Hong Kong, Imperial Porcelain of Late Qing, Kwan Collection, 1983,Catalogue, no. 1
National Museum of History, Taipei, Imperial Porcelain of late Ch'ing, From the Kwan Collection, 1985, Catalogue, no. 1