United States of America-A 1939 Airmail Postage Stamp-Overprint Upsidedown
Illustrated below is a 1930 USA airmail stamp. The emblem is an Airmail Pilots Badge. Part of a set of three with values of 5 Cent (purple), 6 Cent (orange) and 8 Cent (olive). Illustrated here is the 6 Cent (orange) with upsidedown airmail overprint.