25 Dollars Treaty of Maastricht

Liberia's Central Bank issued a sprawling series of small-format gold pieces in the early 2000s commemorating international political events — the Maastricht Treaty among them. The treaty itself had been signed in February 1992 and formally established the European Union, setting the timetable for monetary union that would produce the euro. By 2001, that currency had just been finalized for circulation, giving the issue at least a topical hook.

These Liberian commemoratives were produced almost entirely for the collector market and saw no domestic circulation whatsoever.