28 February (Sierra Leone ) within release Intl. Civil Aviation Org., 40th Anniv. goes into circulation Souvenir Sheet Jet over Freetown face value 5 Sierra Leonean leone
Souvenir Sheet Jet over Freetown in catalogues | |
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Michel: | Mi: SL BL29 |
Stamp Number: | Sn: SL 684 |
Souvenir Sheet is square format.
Also in the issue Intl. Civil Aviation Org., 40th Anniv.:
Souvenir Sheet Jet over Freetown it reflects the thematic directions:
Aviation is the practical aspect or art of aeronautics, being the design, development, production, operation and use of aircraft, especially heavier than air aircraft. The word aviation was coined by French writer and former naval officer Gabriel La Landelle in 1863, from the verb avier (synonymous flying), itself derived from the Latin word avis ("bird") and the suffix -ation.