cover NINGPO: 1899 (18 Sep.) envelope addressed to U.S.A. bearing "C.I.P." 5c. and 10c. tied by Ningpo bilingual c.d.s. with Koban 10c. tied by a fine strike of the "I.P.O." tieprint and Shanghai I.J.P.O. c.d.s. (inverted date in centre), the reverse with overlapping transit c.d.s. via Yokohama; fine. Photo