- Bohemia and Moravia Scott 29, the 60-haleru View of St. Barbara's Church in Kutna Hora stamp of 1939
- China Scott C9, the 60-cent Curtiss "Jenny" over the Great Wall of China stamp of 1929
- Greece Scott C2, the 3-drachma Flying Boat over the Acropolis stamp of 1926.
Spaces for all three of these are in the Blue International. I own the Czech stamp, two of the lower denominations of the China, but nothing from the Greek set. Does anyone reading this have all three?
According to the August 2010 Scott Stamp Monthly, the contest began last year because the editors couldn't decide between two of their favorites. More than 1700 votes were cast with the Falkland Islands' Penguin stamp winning by a 2-1 margin.
To vote, click here. The deadline for voting is 31 August 2010. The Catalogue will be issued in November.