Egypt, Airmail, 1931, Graf Zeppelin, 50m & 100m on 27m deep violet, single of each cancelled by "Suez, Graf Zeppelin, 10. Ap. 31" on unaddressed Royal official cover on the day of the Graf Zeppelin visit, these were apparently given as souvenirs for Minister level officials of the Royal Egyptian Government, Very Fine. SG No. 185. Scott No. C3, C4  Estimate $300 - 400. $0 (Image)