, hotan jade box white abacus calculationSize: 42 * 17 * 3 cm weight: 3768 gAbacus recle, penetration within 13 files, files in the cross beam, beam on two beads, beam under five beads, beads as white jade carved and be.Bridge wearing jade material, border bag embellished with silver and gold, embedded frame around a hoard of agate ornament, special atmosphere.The overall workman, shall be the court everyday items.