The Very Highest Quality Coins! Prestige Portuguese Proof Set : 1988 (Africa Unveiled): Gold, Silver, Platinum & Palladium Coins. Starting in 1987, Portugal released a number of prestige proof coin sets. Each set contained four different 100-escudo coins, one each in gold, silver, platinum and palladium. 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. The set we offer here was the first in the series and called Africa Unveiled 1434 1488 featuring great Portuguese voyages of discovery and maritime explorations along the coast of Africa. The four coins are as follows. Gold 100 Escudo : 24 grams struck in 916.7 % pure gold (22ct). Silver 100 Escudo : 16.5 grams struck in 92.5% pure silver (Sterling Silver). Platinum 100 Escudo : 31.119 grams struck in 99.95% pure platinum. Palladium 100 Escudo : 31.119 grams struck in 99.95% pure palladium. The item “Prestige Portuguese Proof Set 1988 Gold, Silver, Platinum & Palladium Coins COA” is in sale since Tuesday, March 5, 2019. This item is in the category “Coins\Coins\Europe\Other European”. The seller is “jwl8424″ and is located in Balwyn, VIC. This item can be shipped worldwide.