Chinese Acid Green Ground Enameled Porcelain Dragon Bottle Vase. Potted with a long neck and globular body, the exterior is enamelled with vibrant writhing brown five-clawed dragons on a green ground among floating clouds, with gilt mouth rim, the interior and base are enamelled turquoise, with an iron-red Daoguang reign mark to the base. {Height: 12 1/2 inches (31.8 cm)}. Property from a San Francisco Collection.