This joint issue commemorates the birth of Prince Henry the Navigator on 4 March 1394, probably in Porto. His nickname, given by foreign historians in the 19th century, is due to his initiation of the Portuguese expansion to Africa and the Atlantic, thereby starting the European Age of Discoveries. By the time of his death, in 1460, Portugal had discovered or taken possession of the Azores, Madeira and Cape Verde, and had explored and traded along West Africa’s coast as far as Sierra Leone. The stamp shows the presumed picture of the Prince from the Saint Vincent panels, painted in the second half of the 15th century.
All stamps were designed by Luiz Duran and Carlos Leitão, lithographed, and issued on 4 March 1994. The Brazilian stamp is 25×60mm large and has perforation 11½×12, the others are 30×80mm and were printed by the Mint in Lisbon with perforation 12×11¾. The Portuguese stamp was printed on enamelled paper sheets of 5×5 stamps, and circulated until 31 March 1999.