Auction 309-320 - Europe & Overseas Egypt, including the Constantin Kelemenis - Day 4

1946 (Oct 1): Air Navigation Congress 30 m. deep green, overprinted in black, an unused example (position 33, overprint po. 18), variety "Overprint Inverted", fresh and very fine, large part og. Extremely rare in genuine condition with just 50 examples possible. Signed Kessler, Sanabria, Hass. Cert. Hass (2006) Nile Post C103d = $ 400 / Gi = £ 450.rnrnProvenance: The Palace Sale, Harmers, Cairo, 12-18 Feb 1954, ex lot 699.