J.J. Lally & Co., Oriental Art / New York City, New York

A very similar Qingbai porcelain ovoid meiping with transparent glaze of very faint bluish tint from the Samuel T. Peters Collection in the Metropolitan Museum of Art, New York, is illustrated by Valenstein, A Handbook of Chinese Ceramics, New York, 1975, pp. 110-111, no. 106, where the author cites a similar example excavated in 1964 at Macheng county, Hubei province, from the Northern Song tomb of Yan Liangzuo (buried A.D. 1113) and his wife, published in Kaogu, 1965, No. 1, pl. 4-4, with description on p. 22; and another similar example in 1963 at Susong county, Anhui province, in the Northern Song tomb of Wu Zhengchen, dated by epitaph in accordance with A.D. 1087, published in Jingdezhen Taoci, 1984, No. 2, pp. 60-63. 

Another similar meiping is illustrated in the catalogue of the Kai-Yin Lo Collection, Ru yin si xue: Zhongguo wan Tang zhi Yuan dai baici shangxi (Bright as Silver, White as Snow: Chinese White Ceramics from Late Tang to Yuan Dynasty), Hong Kong, 1998, pp. 144-145, and another similar meiping is illustrated in the catalogue of the special exhibition at the Hong Kong Museum of Art, Song Ceramics from the Kwan Collection, Hong Kong, 1994, pp. 230-231, no. 97.