Starting in 1987, Portugal released a number of prestige proof coin sets. Each set contained four different coins, one each in gold, silver, platinum and palladium. The issue price of these sets was in excess of $2,000 US per set, and the issue quantity was surprisingly high, in our opinion, considering the high issue price. It appears to have been a very successful series, as all of the sets catalogue in excess of issue price, up to $2,700 per set, according to Krause.
We have a dedicated page for Portuguese platinum coins
The central theme of the prestige proof sets was the era when Portuguese navigators were leading the world in the discovery of new lands. Each set is described as a series of coins, spanning a number of years. We give details of each series below, from our current stocks.
Series 1: 1987 to 1988
Africa Unveiled 1434 - 1488, featuring great Portuguese voyages of discovery and maritime explorations along the western coast of Africa. Issued to mark the 500th anniversary of the rounding of Cape of Good Hope by Bartolomeu Dias in 1488.
1987 100 Escudos Silver. Gil Eanes Cabo Bojador 1434.
1987 100 Escudos Palladium. Nuno Tristão Rio Gambia 1446.
1987 100 Escudos Gold. Diogo Cao 1486. A longitude of 22.13.6 is shown.
1988 100 Escudos Platinum. Bartelemeu Dias Cabo da Boa Esperança 1488.
Series 2: 1989 to 1990
The Conquest of the Atlantic 1434 - 1488. Issued to mark the 550th anniversary of the settlement of the Azores in 1439. This series feature Portuguese maritime explorations and voyages of discovery in the Atlantic Ocean from 1336 to 1485.
1989 100 Escudos Silver. Discovery of the Canary Islands. 1336 Ilhas Canarias 1479.
1989 100 Escudos Palladium. Discovery of Madeira. 1420 Madeira Porto Santo 1419.
1989 100 Escudos Gold. Discovery of the Azores. 1439 Arquipélago dos Açores 1427 - 1452.