A Chinese jade cong carving , Ming dynasty or earlier, of square section, pierced through the centre with a cylindrical tube rising at either end to a short collar, the sides with each corner terminating with raised bands, 5cm high x 11.4cm wide Provenance: By repute bought from a Hong Kong private collector in the 1980's 新石器时代 玉琮 拍品来源：现藏家于 80 年代购自香港   Condition Report: general wear to the surface