cover 1866 covers (5) bearing Circular ½a. grey-black (3, all cut square, two with orange seal and one with purple seal); 1877-78 for use in Jammu ½a. black on European laid paper, cut square on cover to Kashmir, ½a. black on native paper (2, one cut to shape on India stationery), all tied by the Jammu rectangular "Iron Mines" seal in black

Details
cover 1866 covers (5) bearing Circular ½a. grey-black (3, all cut square, two with orange seal and one with purple seal); 1877-78 for use in Jammu ½a. black on European laid paper, cut square on cover to Kashmir, ½a. black on native paper (2, one cut to shape on India stationery), all tied by the Jammu rectangular "Iron Mines" seal in black