1929, two international registered letters with Junk franking addressed to the same person in Germany but sent via very different routes from Hankow, one with four-colour franking of 2x 1 C, 4 C olive, 3x 7 C and 10 C Junk via Siberia, the other with 5 C and 2x 16 C Junk and unusual routing via the US, the letter via the US took about two weeks longer than the route via Russia, interesting set
6; Übersee A-Z; CHINA; Markenausgaben
6; Overseas A-Z; CHINA; Stamp Issues