O) 1917 CHINA- MANCHURIA, 10 C. BLUE- PAIR, TIED BY SHANGHAI DATE STAMP WITH HAND STRUCK, REGISTERED ENVELOPE ADDRESSED TO DENMARK BEARING SG277, R. SHANGHAI AND FRAMED INSTRUCTIONAL, 10 GRMS IN RED, ROUTED VIA SIBERIA WITH MOUKDEN AND HARBIN TRANSITS WITH BOXED RUSSIAN CENSOR N°17 H.B.O AND LABEL WITH COPENHAGEN ARRIVAL ON REVERSE, RARE INSTRUCTIONAL, XF