I.C.S. Chamba 1887-95 2a dull blue error, SG5cIndian Convention States Chamba 1887 95 2a dull blue, error "8TATE", SG5c. A fine unused example. The error occurred only once per sheet in the October 1886 printing. Of the 21 possible examples, only six unused examples have been recorded, one of which resides in the Royal Philatelic Collection. With a British Philatelic Association (BPA) certificate of authenticity, 14,400 (1949), not present. A very rare and most visually appealing overprint error.