A CHINESE MONOCHROME BLUE-GLAZED SQUARE VASE, CONG Tongzhi mark but later 藍釉象耳琮式瓶 《大清同治年製》款 The square-section vase rising from a splayed foot to a short neck, the shoulders flanked by a pair of moulded elephant ring handles, covered in a thick dark-blue glaze that pools to white at the extremities, the base with an apocryphal six-character Tongzhi mark, 31cm high