AN ENAMELLED GLASS ‘WEIQI PLAYERS’ SNUFF BOTTLE, YANGZHOU SCHOOL, SEAL MARK AND PERIOD OF QIANLONGOpaque white glass with painted polychrome enamels in very thin relief. China, ca. 1770-1795Delicately painted to depict three Weiqi players under a beautiful willow tree, with the reverse showing a sch