The four jade articles used as the subjects of this set of stamps were recommended by the National Palace Museum. They are described as follows:2.00 Kuang Decorated with Coiled Hornless Dragons Sung Dynasty (960-1279 A.D.) Height: 15.4 cm. Diameter: 8.5 cm 5.00 Dark Green Jade Melon-shaped Brush Washer Ming Dynasty (1368-1644 A.D.) Length: 11.6 cm. Height: 4.1 cm 8.00 Bluish Jade Po Monk's Alms Bowl with Dragon Ching Dynasty (1644-1911 A.D.) Height: 7.8 cm. Diameter of mouth: 15.2 cm. 10.00 Yellow Jade Brush Washer with Coiled Hornless Dragons Ching Dynasty (1644-1911 A.D.) Height: 8 cm. Maximum expanse at mouth: 18.8 cm.