10 Heller

Liechtenstein issued its own emergency paper money — Notgeld — only once, in 1920, and this 10 Heller is among the smallest-denomination notes in that series. The principality had no central bank and no printing infrastructure of its own; the notes were produced locally under the authority of Prince Karl, whose signature appears alongside that of government official Fred. Wangler. The Heller itself was already a dying unit — Austria abolished it the same year.

Pick #1 is the opening entry in Liechtenstein's entire paper money history, which remains one of the shortest national issues on record.