Offices in China, 1919, 2¢ on 1¢ green, block of four, cancelled by central strike of U.S. Postal Agency Shanghai registry oval; some light creasing, Very Fine appearance. Scott No. K1  $375. Stamps of the 1917-1919 series were overprinted by the Bureau and issued to the U.S. Postal Agency in Shanghai, China. The 1¢ stamps were overprinted 2¢ and sold at that value in local currency and were valid on U.S. mail. $0 (Image)