Ref: 6974
- £495.00
1939 envelope flown on the Seychelles / Mombasa stage of the 'Guba 11' Indian Ocean survey flight on 21st June 1939. Franked 12c tied 'SEYCHELLES' c.d.s. JU 17 39' Flown by Imperial Airways from Kisumu to Karachi at the 'All up' rate of 20 cents per half ounce.
