0 Euro - 50. Výročie odporu proti okupácii

The "0 euro" souvenir note format was launched commercially around 2015 by a French company specifically targeting the European tourism market — these are legal-design but zero-denomination pieces, sold at face value as collectibles and never intended for use as currency. This example commemorates the 50th anniversary of resistance to the 1968 Warsaw Pact invasion of Czechoslovakia, when Soviet-led forces crushed the Prague Spring reforms. Slovakia produces these alongside the Czech Republic, each claiming a distinct national narrative around the same event.

Oberthur's involvement is standard for the series. The watermark is a contractual feature of the programme, not a response to any counterfeiting concern.