, the mechanism intact, with green patina and retained in its wooden arm, with traces of the scale, the bow part no longer present. 54cm long, 21cm high
The unit for calculating the bow's strength is called 'shi' or 'a stone'. According to records, bows are rated as one, three, four, five, six, seven, eight, ten, twelve stones, and so on. The most common is six stones, the range being approximately 260 metres.