United States Air Post Stamp
United States · 1918 · 24c
This stamp features a Curtiss JN-4 "Jenny" biplane, the primary training aircraft for the U.S. Army during World War I. The design is framed by a simple border with the denomination and country name. It was issued to pay the rate for the first scheduled airmail service in the United States.
Issued in 1918, this stamp marks the beginning of regular airmail service in the U.S., a significant milestone in postal history and aviation. The most famous error in U.S. philately, the "Inverted Jenny," comes from this issue.
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Perfectly centered, fresh, no faults
Well centered, fresh colors
Nicely centered, minor flaws
Average centering, acceptable
Off-center or visible wear
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