YONGZHENG SIX-CHARACTER MARK IN UNDERGLAZE BLUE WITHIN A DOUBLE CIRCLE AND PROBABLY OF THE PERIOD

Compare a yellow and green-enameled cup of similar form and size (2 1⁄2 in. diam.), in the Wang Xing Lou collection, illustrated by R. Jacobsen, Ye Peilan and J. Thompson in Imperial Perfection: The Palace Porcelain of Three Chinese Emperors, Kangxi - Yongzheng - Qianlong, Hong Kong, 2004, pp. 100-01, no. 34.