5975272 Dagger, Northwest China, 7th-6th century BC (bronze) by Chinese School; length: 27.3 cm; Private Collection; (add.info.: The tapering double-edged blade has a raised median rib on each side and issues from a guard cast as a mask flanked by spirals at the base of the hollow hilt cast in relief on both sides with a stacked column of dragon heads with rolled snouts and curled crests which project along the edges and separate slits on the narrow sides, all below a larger mask with coiled snout, ruyi-shaped ears, and curled crest, which also has slits on the edge. All of the heads have circular eyes hollowed for inlay.); Photo by Christie\'s Images.