A very similar ewer of the same size and proportions, also bearing a Qianlong four-character mark but with the dragons forming the handle and spout, rather than coiling around them, was included in the Spink & Son exhibition, The Minor Arts of China, London, 1985n no. 213 and later illustrated in Jade (ed. Roger Keverne), London, 1991, p. 182, fig. 135. The representation of the dragon finial also appears to be nearly identical on both examples.
Compare the depiction of the coiled dragons with a similar treatment of a dragon around the handle of a waterpot in the Seattle Art Museum, illustrated by J. Watt, Chinese Jades from the Seattle Art Museum, Seattle, 1989, p. 98, no. 77.
The presence of both a Qianlong and a Jiaqing reign mark on the ewer suggests that it is a rare example of a piece that was used in the Imperial court during both reign periods.