1 Dollar - Charles III Poland in NATO

Niue has operated as a prolific licensing hub for themed bullion issues since the 1990s, with the New Zealand territory's arrangement allowing foreign mints and private distributors to produce coins under its authority in exchange for nominal revenue. This particular issue commemorates Poland's 25th anniversary of NATO accession, which occurred in March 1999 — a date that carried outsized political significance for a country that had spent four decades inside the Warsaw Pact.

Poland joined alongside Hungary and the Czech Republic in the alliance's first post-Cold War enlargement round.