2006-2007 Priority and Express Mail
Set of 4
Own 4 high-value stamps issued for use on Priority and Express Mail. Special collector's set includes:
2006 $4.05 X-Plane, Priority Mail
The X-15 rocket plane appears on this Priority Mail stamp. The X-planes were experimental U.S. aircraft created to test the technology of supersonic and space flight. The X-1 was the first plane to break the sound barrier (1947).
2006 $11.40 X-Plane, Express Mail
This Express Mail stamp features a side view of the X-15 plane. Only three X-15 planes were built. They made 199 flights from 1959 to 1968. Thirteen of those flights exceeded 50 miles in altitude, the U.S. criterion for spaceflight. The pilots on those flights qualified as astronauts.
2007 $4.60 Air Force One, Priority Mail
With the words "United States of America" and the presidential seal painted on its exterior, Air Force One is recognized throughout the world as a symbol of America. With up-to-date specialized equipment, the Boeing 747 serves as a flying White House.
2007 $16.25 Marine, Express Mail
Marine One always accompanies the President on his travels, whether within the United States or abroad. For security purposes, Marine One is flown in a group of identical helicopters that change formation in flight.