£340
1920 Bombay to Karachi experimental air service, registered cover franked 8a + 2a6p carried on the third flight with Feb. 10 Air Post c.d.s; and a cover franked ½a + 2a + 3a pair carried on the sixth flight with Mar. 12 Air Post c.d.s , Karachi Air Post backstamps, two unusually fine covers. (2).
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