A very similar Yongzheng-marked vase of slightly larger size with a Ru-type glaze in the National Palace Museum, Taibei, was included in the exhibition, Qing Monochrome Porcelain, Catalogue, 1981, no. 77. Compare a celadon-glazed example of similar size with a Yongzheng mark from the J.M. Hu Collection, sold at Sotheby's New York, 4 June 1985, lot 40. There seems to have been a predilection for these multi-spouted vases in the Yongzheng period. Another type combining five vases with a Ru-type glaze, was included in the Exhibition of Ancient Chinese Ceramics from the Collection of the Kau Chi Society, Hong Kong, 1981, Catalogue, no. 132. The Museum of Fine Art, Boston, has in its collection a six-necked vase of this type under a teadust glaze, illustrated in Oriental Ceramics, vol. 10, no. 265; it is unmarked, but is dated to the Yongzheng or Qianlong period.