US Stamps - K - Offices in China
United States Offices in China were issued for sale by the postal agency at Shanghai, at their surcharged value in local currency. Valid to the amount of their original values for the prepayment of postage on mail dispatched from the US postal agency in Shanghai to addresses in the United States. U.S. Offices in China stamps were first issued May 24, 1919. Offices in China stamps offer both a history lesson and a collecting challenge. United States offices in China stamps were created by overprinting regular stamps with the name of the operating office.