1/5 Barbuda - Fernando I Porto mint

Fernando I struck the barbuda series during a period of acute monetary instability, when repeated debasements had so eroded public confidence in Portuguese coinage that his own legislation attempted — unsuccessfully — to regulate exchange rates between domestic issues and foreign silver. The Porto mint's output for this denomination was considerably smaller than Lisbon's, and examples attributable to it with confidence are scarce in any condition.

Fernando's reign ended in 1383 with a succession crisis that plunged Portugal into war with Castile, after which the entire barbuda coinage was effectively swept from circulation by Joanine monetary reforms.