The wide flat beading along the edge where lid and box meet is not only decorative but also strengthens the wood where it is thinner for the lid to overlap. Compare a nearly identical box formerly in the collection of Wang Shixiang and now held in the Shanghai Museum, illustrated in Wang Shixiang, Classical Chinese Furniture - Ming and Early Qing Dynasties, Hong Kong, 1986, p. 234, pl. 157, and Wang Shixiang, Connoisseurship of Chinese Furniture: Ming and Early Qing Dynasties, Hong Kong, 1990, vol. II, p. 170, E15.
See, also, a nearly identical box formerly in the collection of George Kates and now owned by Robert Hatfield Ellsworth, illustrated in R.H. Ellsworth, Chinese Furniture: Ming and Early Ch'ing Dynasties, New York, 1971, p. 235, fig. 151.