Compare a similar vase from the National Palace Museum, Taipei, illustrated in the exhibition catalogue Special Exhibition of K'ang-hsi, Yung-cheng and Ch'ien-lung Porcelain Ware from the Ch'ing Dynasty, Taipei, 1986, no. 102. Another from the San Francisco Asian Art Museum is illustrated by He Li, Chinese Ceramics, London, 1996, pl. 523. A pair of similar vases from the J.M. Hu Collection, now in the Shanghai Museum are illstutrated in Selected Ceramics form the J.M. Hu Collection, Shanghai, 1989, p. 109. no. 72; another single example from the E.T. Hall Collection, no. 262, was sold in our London Rooms, The E.T. Hall Collection of Chinese Monochrome Porcelains, 7 June 2004, lot 148. Compare also a Jiaqing example in the Meiyintang Collection illustrated by R. Krahl in Chinese Ceramics from the Meiyintang Collection, vol. 2, p. 221, no. 881.