200 000 Zlotys Sigismund I the Old bust, Trial Strike

Trial strikes from the NBP's early 1990s commemorative program were produced in alternative metals to test die quality and striking pressure before authorizing final production runs — nickel blanks used here in place of the gold or silver intended for circulation issues. Most were retained internally or distributed to a small circle of officials and approved collectors, meaning survivorship outside institutional holdings is genuinely low. Sigismund I ruled Poland-Lithuania from 1506 to 1548, overseeing the minting reforms that introduced the Polish grosz system to greater standardization.