Offices in China, 1919, 2¢ on 1¢, 40¢ on 20¢, and $1 on 50¢ overprints (Scott K1-K13-K15), with "U.S. POS. SERVICE, SHANGHAI/CHINA" postmarks. Scarcely used in Shanghai, mostly well-centered, and with socked-on-the-nose cancels, making it an attractive and desirable group. Overall, Very Fine condition. Scott $420