1897, Imperial Chinese Post 4 c. and 4 c., each in pair, together with 1898, 2 c. red, tied by clear dollar-chop "NANKING 13 JAN 99" to reverse of registered envelope with frontside Hongkong 10 c. lilac on red in horizontal pair with clear "SHANGHAI JA 16 99", to Germany with arrival mark; a fine and scarce combination cover
