Compare a related oval Kangxi pen box in famille-jaune enamels in the Palace Museum, Beijing, illustrated in Qing Porcelain from the Palace Museum Collection. Kangxi, Yongzheng, Qianlong, Hong Kong, 1989, pl. 102; and another of this shape and palette but decorated with dragon motifs, in the Musée Guimet, Paris, illustrated in Michael Beurdeley and Guy Raindre, Qing Porcelain, London 1987, pl. 75, col.pl. 105.