0 Euro - Technisches Museum Wien

Zero-euro souvenir notes occupy a strange corner of notaphily — legal in production under European Central Bank tolerance policy, they carry no monetary value but must nonetheless meet specific design constraints, including the prohibition on reproducing the exact appearance of genuine euro banknotes. The Technisches Museum Wien, Austria's principal science and technology museum, has issued several of these over the years, typically timed to exhibitions or institutional anniversaries. The watermark on this example is a nod to functional security printing rather than any real anti-counterfeiting necessity.