A smaller Yongzheng-marked bulb bowl of this shape (18.4 cm.) glazed in imitation of Ruyao was included in the Min Chiu Society exhibition, Monochrome Ceramics, Hong Kong, 1977, no. 112. A white-glazed example, also smaller (15.5 cm.), of Yongzheng date in the National Palace Museum, Taipei, was included in the Special Exhibition of Ch'ing Monochromes, Taipei, 1981, no. 61. Compare, also, the smaller Ge-type example (16 cm.), with the same mark, in the T.Y. Chao Private and Family Trust Collections sold Sotheby's, Hong Kong, 18 November 1986, lot 91.