20 Euros Specimen

The 2001 series Euro notes — the "First Series" or ES1 — entered circulation on 1 January 2002 simultaneously across twelve countries, the largest single currency changeover in history by population. Robert Kalina, an Austrian banknote designer at the Oesterreichische Nationalbank, won the design competition in 1996; his submission used architectural motifs drawn from no specific real structure, deliberately avoiding the political minefield of privileging any one member state's heritage.

Specimens of this issue were distributed to central banks and financial institutions ahead of the January 2002 launch for training and anti-counterfeiting familiarization. The SPECIMEN perforation or overprint renders them non-negotiable by definition, but their pre-launch distribution makes them a direct artifact of the changeover preparation machinery.