Lot
603 
Egypt, 1926 Cairo - Khartoum Special Flight, pristine cover to Khartoum franked with 1923, 5m orange brown tied by "Abu Suwer, 9.Ja.26" cds, endorsement and initials at lower left, Very Fine and choice, very scarce with fewer than 50 covers were flown on this R.A.F. squadron no 47 test flight. AAMC No. 13. Estimate $200 - 300.
Realized: $160