unused  2c. carmine [5/11] vertical pair, top stamp showing space between "o" and "n" of "Hong" of the sixth printing, light gum ageing, with original gum. R.P.S. Certificate (1997). Photo
unused 2c. carmine [5/11] vertical pair, top stamp showing space between "o" and "n" of "Hong" of the sixth printing, light gum ageing, with original gum. R.P.S. Certificate (1997). Photo

Details
unused 2c. carmine [5/11] vertical pair, top stamp showing space between "o" and "n" of "Hong" of the sixth printing, light gum ageing, with original gum. R.P.S. Certificate (1997). Photo