On the occasion of the 60th birthday of Chairman Chiang Kaishek on October 31, a set of commemorative stamps was issued to commemorate his distinguished services to the country in connection with the National Revolution, the Northern Expedition, and the War of Resistance against Japan, which resulted in the victory for our country. The central designs Chairman Chiang's portrait at the time of his inauguration. Nine Seal characters〝蔣主席6秩壽辰紀念〞(to commemorate Chairman Chiang's 60th Birthday) appear in a curved line at the top. The frame on four sides of the stamps was composed of 60 characters〝壽〞(shou, meaning longevity) also of the Seal style.　　The printing by the intaglio process was entrusted to the Dah Yeh Printing Co., Shanghai, (大業書局上海印刷廠) but, as it was subsequently discovered, its intaglio equipment was insufficient to complete the printing before the birthday, so arrangements were then made with the Shanghai Printing Press of the Dah Tung Book Co.(大東書局上海印刷廠) to assist in the printing with plates made from the Dah Yeh master plates. The work was divided so that the Dah Yeh Printing Co. undertook the printing of $20 and $100 denominations, and the Dah Tung Book Co. undertook the printing of $30, $50, $200 and $300 denominations. But in the latter period of printing, both contractors worked on all the six denominations. The stamps of the Dah Tung Print were invariably gumless, while those of the Dah Yeh Print were without gum in the earlier part of the printing and with gum in the latter part. The perforation of the Dah Tung Print is 14, and that of Dah Yeh Print varies from 10 1/2 to 11 .