Previously sold at Sotheby's London, 12 June 2003, lot 180.
Compare the present lot with three other vases of identical design sold at auction. The first sold at Sotheby's New York, 1 June 1988, lot 158; the second at Sotheby's London, 8 June 1993, lot 109; and a third at Christie's Hong Kong, 27 October 2003, lot 697.
See a larger Qianlong-marked vase (27 cm. high) of this form in the Baur Collection, illustrated by J. Ayres, The Baur Collection, vol. 2, Geneva, 1999, p. 171, no. 275; and a larger Yongzheng example covered in flambe glaze in the National Palace Museum, illustrated in Monochrome Porcelains of the Ch'ing Dynasty, Taipei, 1970, no. 20.