A Pair of Blue Glazed Porcelain Cong Vases LATE QING DYNASTY each of archaic jade cong form, of rectangular form molded with eight trigrams, raised on a short circular foot surmounted by a sloping neck and a lipped mouth, the underside bearing a Qianlong six-character underglaze blue mark, raised on a fitted hardwood stand. Height of each 11 1/4 inches.