Abacus, suanpan, kept in a qin'-shaped, Chinese lute, dark wooden box with natural-coloured wooden lid. It is divided into two sections by a crossbeam with natural-coloured wooden beads sliding up and down 18 parallel brass runners, each of which has two beads above and five beads below. There is a rectangular box next to the abacus for storage. Top of the lid is decorated on one end with inlaid endless knot design made of ivory and dark wood and a band of small ivory discs set in dark wood; the other end with inlaid shou, longevity, character flanked by two scrolling dragons made of horn. The transverse sides of the box are inlaid with ivory endless knots design alternating with green gemstone discs.
