Compare the pair of slightly smaller bowls of this shape, also with an opaque turquoise glaze and bearing a Jiaqing seal mark, but in underglaze blue, illustrated in The K.M. Lui Collection, Hong Kong, 1989, no. 146 and another, also with underglaze blue mark, illustrated in Zhongguo Taoci Daxi, Qingdai Taoci Daquan (Chinese Ceramics Series, Qing Dynasty Ceramics), Taipei, 1987/89, p. 364. A similar bowl with a Yongzheng mark is in the Baur Collection, illustrated by John Ayers in the Catalogue, vol. III, Geneva, 1972, no. A 478