20 Zlotys Frédéric Chopin

Issued to mark the bicentenary of Chopin's birth, this was a commemorative collector note rather than a circulating banknote — legal tender in theory, but released in sealed folders and almost never spent. The NBP produced it in a limited run, and the engraving by Przemysław Krajewski is worth examining closely: intaglio work of this precision on a domestically printed commemorative was something PWPW had been refining across several prestige issues in the 2000s.

Cotton substrate, standard thread, watermark — the security specification is modest for a collector piece, which reflects its intended audience rather than any production shortcut.