Auction Series 257-264 in Zurich Day 4

Suez Canal Company 1868 (July): 5 c. green, a used vertical pair, with large margins at sides and at top where roughly separated and showing portion of adjoing stamp, touched at base, cancelled by bold strike of "5129" gros chiffres of the French Post Office in Port Said in black. An extremely rare usage (approximately 7 known thus including the famous cover). Signed Todd AIEP. Cert. Holcombe (1990).
Catalogue 261: Stamp Issuing Steamship Companies