Compare the mallow-shaped Geyao washers dated to the Song dynasty are preserved in the Beijing Palace Museum, illustrated in The Complete Collection of Treasures of the Palace Museum: Porcelain of the Song Dynasty (II), Hong Kong, 1996, pls 56-57, 59-61.
In overall good condition except for two hairline cracks (the longest approx. 2.5cm extending in an irregular line from the rim to the interior) and a shallow glaze flake to the rim. Typical firing imperfections including pinholes. "In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue. NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."