Note: The present vase is very finely potted to an elegant and well-balanced form, covered with an attractively unctuous glaze simulating the revered bluish-grey glaze of Northern Song Ru wares. Compare to several Ru-type glazed vases of similar form, the first of a smaller size from the collection of the British Rail Pension Fund, sold at Sotheby's Hong Kong, 16 May 1989, lot 48; another smaller example exhibited in the City Museum of St. Louis from 1911 until 1943/44, sold at Christie's New York, 21 March 2002, lot 237; one larger example from the J. Pierpont Morgan Collection, sold at Christie's Hong Kong, 26 April 2004, lot 1055; and a smaller one from the Zhuyuetang Collection, illustrated in Monochromes of the Yuan to Qing Periods. The Zhuyuetang Collection, Hong Kong, 2005, pl. 96. 

Christie's. Important Chinese Ceramics and Works of Art, 26 November 2014, Hong Kong, HKCEC Grand Hall