細節
cover 4a. Second Printing, an example with three margins (touched at left), clearly cancelled "1" in diamond of bars and affixed to 1857 (June) E. from Bombay to Shanghai showing "BOMBAY/B.P.P./PAID" alongside the adhesive; the 4a. with light mark at top and the E. creased, though not unattractive. B.P.A. Certificate (1987). Photo