This box belongs to a small group of cloisonné pieces bearing prominent enamelled Wanli marks within a rectangle and encircled by ruyi heads. The pieces in this category often share similarities in decoration and colour. Compare with the circular box and cover sold in these Rooms, 30 October 2001, lot 677; and the cylindrical box illustrated by H. Brinker and A. Lutz, Chinese Cloisonné: The Pierre Uldry Collection, Zurich, 1989, pl. 112.