Tostão - Pedro IV

Pedro IV's reign in Portugal lasted precisely sixty-eight days before he abdicated in favor of his daughter Maria, making this one of the shortest-reigning monarchs to appear on Portuguese coinage. He had already been Emperor of Brazil since 1822, and the constitutional crisis his brief Portuguese kingship triggered — pitting liberal Pedristas against the absolutist Miguelites — would drag Portugal into civil war within years of this issue's authorization.

The 1826–1828 date range reflects striking across the transition period, not a single year's production.