Due to the differences in currency between Tibet and other parts of China, especially the popularity of Indian Rupee in Tibetan commercial market, the I.P.O. finally decided to issue a set of postage stamps in Rupee values and restricted for use in Tibet. A set of 11 values of the CIP coiling dragon stamps were overprinted with Chinese (denote value in 四川盧比 / Szechwan Rupee, also known as Tibet Rupee, 藏洋 / T'sang Yang; 藏元 / T'sang Yuan; 川卡 / Chuen Ch'ia; 藏幣 / T'sang Pi and 洋錢 / Yang Chien. 1 Szechwan Rupee = 32 (tael) cents), English (denote value in Indian Rupee, 1 Rupee = 16 Annas, 1 Anna = 4 pice or 12 pies) and Tibetan (same as in Chinese) by the Inspectorate General Statistical Department in Shanghai and issued in March 1911.