An engraved white stem cup with similar knopped stem was included in the Exhibition of Ch'ing Porcelain from the Wah Kwong Collection, Hong Kong, 1973, Catalogue no. 51. The same carving also appears on a white Yongzheng stem cup with flared foot sold in these rooms 14 November, 1983, lot 154 and on Yongzheng yellow-glazed stem cups with knopped stems in the Percival David Foundation, Catalogue, section 6, no. A575, and the Baur Collection, Catalogue, vol. III, no. A450.