Inverted Jenny Stamp
A French Resistance fighter seized this rare misprinted U.S. stamp from a Nazi hoard in 1944. The 1918 airmail stamp shows an upside-down biplane and was reportedly part of Himmler’s philatelic collection. Stamp collectors prize this iconic printing error above almost all others. A pristine example reached $1.6 million at auction in 2016, suggesting wartime examples could exceed $1.5 million if authenticated.
