5 Dollars Estonia

Liberia's early 2000s commemorative program produced a string of niobium-core issues marketed heavily to the collector trade rather than domestic circulation — this piece almost certainly never saw a Liberian pocket. The "Estonia" designation places it within a series honoring European nations, a curious exercise for a West African central bank with no particular historical ties to the Baltic states.

Niobium coinage of this type was pioneered by Austria's Münze Österreich beginning in 2003, and the technology was quickly licensed or replicated for collector-market issues worldwide. The localized gilding treatment is a production variable worth noting on any example.