U.S. #2468
$1 Seaplane
Transportation Series
Issue Date: April 20, 1990
City: Phoenix, AZ
Quantity: 23,900,000
Printed By: Bureau of Engraving and Printing
Printing Method: Engraved
Perforations: 9.8 vertically
Color: Blue and scarlet
This stamp, which featured a 1914 seaplane, also featured many "firsts" for the Transportation Series. It was the first in the series to depict an aircraft, and it was also the first to feature human figures - a pilot and a passenger. Its $1 face value was four times higher than any other 45 previous issues, and its bi-color design made it the first stamp to be printed in two colors.