The Sao Tome and Principe Dobra (STD) is the official currency of Sao Tome and Principe, a small island nation located in the Gulf of Guinea, off the western coast of Central Africa. The currency is issued by the Central Bank of Sao Tome and Principe. The currency code for the Sao Tome and Principe Dobra is STD.The Sao Tome and Principe Dobra is divided into 100 centimos. However, centimo coins are no longer in circulation. The banknotes are available in denominations of 1000, 2000, 5000, 10,000 and 20,000 dobras.The Sao Tome and Principe Dobra is not widely used outside of Sao Tome and Principe and is not traded in international currency markets. It is used primarily for local transactions, such as buying goods and services in the country. The Euro and the US dollar are also widely accepted in Sao Tome and Principe.It is worth noting that Sao Tome and Principe is a small island nation with a small economy, thus its currency is not considered as a safe-haven currency, and its exchange rate can be affected by various factors such as the country's economic performance, interest rate, political stability, etc.