A very rare yellow-ground green-enamelled 'dragon' vase, Mark and period of Yongzheng 清雍正 黃地綠彩海水雲龍雙貫耳橄欖瓶 《大清雍正年製》款 the baluster body rising from a gently splayed foot to a tall neck flanked by a pair of tubular handles, finely incised and decorated in green enamel against a yellow ground with nine scaly five-clawed dragons writhing amongst cloud scrolls, with cresting waves and a keyfret band below, the neck encircled with a ruyi band and another keyfret, the base inscribed with a six-character reign mark within a double circle h. 30.5 cm