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Each disc has a central circular aperture. The first is of pale buff green color, the second is of beige and grey color, the third is of pale grey color with light beige patches, and the last is of dark grey color with beige markings. Three of the bi are from Southeast China, the fourth is from Northwest China. Largest, 33?4 in. (9.5 cm.) diam., cloth box
请注意,拍品为私人藏家所有。
来源
欧云伉俪珍藏,纽约,1987年前入藏。