250 Dobras Independence

São Tomé and Príncipe gained independence from Portugal on July 12, 1975, after centuries of colonial rule and a relatively peaceful transition negotiated during the political upheaval following Lisbon's Carnation Revolution of April 1974. This 1977 silver issue is part of the first commemorative series released by the newly established Banco Nacional — an institution that itself was only months old when the dies were cut.

The archipelago had no meaningful pre-colonial monetary tradition of its own; all coinage prior to independence was Portuguese-issued. These early national pieces were struck primarily for the international collector market rather than domestic circulation.