A similar example in the Baur Collection, Geneva, is illustrated in the Catalogue, vol. IV. fig. A539, no. 518, where Ayers in an accompanying footnote cites other comparable waterpots in the Percival David Foundation, illustrated in the Catalogue, part 3, B. 702, those included in the Oriental Ceramics Society exhibition, Arts of the Ch'ing Dynasty, May-July, 1964, pl. 67 in the Catalogue, noteworthy for having the nianhao executed in two vertical columns; and the jar in the Musee Guimet, depicted by Grandidier, La Ceramique Chinoise, Paris, 1894, pl. XXII, no. 59.