Compare the similar blue glass vase in the Robert H. Clague Collection included in the exhibition, Chinese Glass of the Qing Dynasty, 1644-1911, Phoenix Art Museum, November 21, 1987-January 31, 1988, illustrated by Brown and Rabiner in the Catalogue, no. 11; and another included in the exhibition, Chinese Jewellry and Glass, Spink & Son Ltd., London, December 6-20, 1989, Catalogue, no. 129. Compare, also, the example sold in these rooms, June 4, 1992, lot 48