Kwan discusses the dated bowl included in this lot in op cit., p. 34, explaining that it is a sample submitted for approval by the Imperial Kiln before completion of an order from the Department of Works in Beijing.
The Chinese University of Hong Kong, Imperial Porcelain of Late Qing, Kwan Collection, 1983, Catalogue, no. 19
National Museum of History, Taipei, Imperial Porcelain of late Ch'ing, From the Kwan Collection, 1985, Catalogue, no. 19