A similar dish from the T.Y.Chao Collection was sold in Hong Kong, 19 May 1987, lot 286. Another from the Freer Gallery of Art is illustrated by Beurdeley and Raindre in Qing Porcelain, p. 167, fig. 231.
In the Baur Collection Catalogue, vol. III, p. 10, Ayers suggests that the group of fine Yongzheng-marked pieces under pale celadon glazes was 'evidently inspired by the light bluish-green kinuta-type glazes' of Longquan wares 'of the best period, that of the twelfth-thirteenth centuries, an indication in some instances borne out by the close reproduction of early forms'. Reproduction of Longquan glazes was indeed on T'ang Ying's List of Porcelains Supplied to the Court in 1729.