A Rare longquan Celadon Duck-form Censer Modelled as a duck standing atop an openwork rock-work base, with the head turned to the side and upwards, its overlapping left wing removable to reveal an oviform opening in the back, the beak partially open and the base of the tail pierced for the release of smoke, detailed with carved feather markings and covered with a crackled sea-green glaze. Period: Ming. Height: 19 cm.