1911-20, Three covers incl. Allahabad First Aerial Post cover to Agra, with KEVII 3a, 6a & 12a tied by special flight cachets with registered label on reverse, despatch and Agra backstamps, minor soiling, and 1920 (Mar 11) Bombay to Karachi flight with 12a tied by BOMBAY / AIR POST cds, with « Karachi Air Service » manuscript alongside, and 1920 Gwalior registered envelope Lashkar to Bombay with QV/KGV franking, faults