Guatemala's shift to brass-plated steel for this denomination was driven by the same cost-cutting logic that swept through Latin American mints in the 2000s and 2010s — base metal prices had made traditional alloy coinage economically indefensible at face value. The magnetic core allows automated sorting in commercial cash handling, a practical necessity for a coin this size in high-volume retail circulation.
KM#284a distinguishes the steel-core issue from its predecessor. The "a" suffix is the tell.
Guatemala's shift to brass-plated steel for this denomination was driven by the same cost-cutting logic that swept through Latin American mints in the 2000s and 2010s — base metal prices had made traditional alloy coinage economically indefensible at face value. The magnetic core allows automated sorting in commercial cash handling, a practical necessity for a coin this size in high-volume retail circulation.
KM#284a distinguishes the steel-core issue from its predecessor. The "a" suffix is the tell.