São Tomé & Principe is an island nation just off the Gabonese coast centered around two island groups after which the country was named. Portuguese explorers discovered the then uninhabited islands around 1470. São Tomé was discovered on St Thomas Day and Principe on St Anthony's Day and thus was named Santo Antão until renamed in 1502 in honour of the Portuguese prince who was entitled to the tax revenues of the island.
The islands used Portuguese currency until the Banco Nacional Ultramarino started issuing banknotes in 1914 and coins in 1929. São Tomé & Principe gained independence in 1975 (one year after the overthrow of the Estado Novo regime in Portugal) together with most Portuguese overseas territories. In 1977 the Escudo was replaced by the Dobra (STD) at Par, which was worth 35 to the USD at that time. Chronic inflation eroded the value of the STD. In 1995 a USD was worth 1420 STD and by 2015 this rate was 21,400, making it one of the least valued currency units in the world.
Coins of São Tomé & Principe are pretty rare. Even the current series of 100 to 2000 Dobras are hard to find unless you pay up relatively much compared to other contemporary coin series. It is even harder finding ST&P Escudo coins, which look a lot like other overseas Portuguese coins.
https://en.numista.com/catalogue/sao_tome-et-principe-1.html
