A pair of dishes of this size with similar Yongzheng marks covered with what is described as a pale cobalt-blue glaze is in the Percival David Foundation, Catalogue, Section 6, 1973, nos. B560 and 561. A pair with lavender glaze was included in the S. Marchant & Son exhibition, Qing Mark and Period Monochromes and Enamelled Wares, London, 12 - 24 July 1981, no. 5. And two other similarly marked dishes of the same size, also with lavender-blue glaze, were included in the O.C.S. Exhibition of Monochrome Porcelain, London, 1948, nos. 39 and 136.