São Tomé and Príncipe Dobra

The Sao Tome and Principe dobra reveals a currency where tropical biodiversity and precise monetary reform converge into a modern polymer system.

Quick Facts

Country: Sao Tome and Principe

Code: STN

Symbol: Db

System: Decimal (1 Dobra = 100 Cêntimos)

Status: In circulation

Issuer: Central Bank of São Tomé and Príncipe

The Story of the São Tomé and Príncipe Dobra

The Dobra replaced the Portuguese escudo after independence, but its defining modern transformation came in 2018 with a 1,000:1 redenomination, creating the new dobra (STN) and restoring usability after decades of inflated nominal values. This reform was reinforced by a formal peg to the euro via an agreement with Portugal, anchoring the currency within a rare euro-linked framework in sub-Saharan Africa. Yet the deeper historical layer lies in the enduring presence of Rei Amador—the leader of the 1595 slave revolt—whose stylized portrait defined earlier banknotes and continues to appear as a watermark in the modern series. This continuity bridges pre- and post-reform issues, giving the dobra a rare symbolic anchor across monetary eras.

Design & Symbolism

The 2018 series stands among the most biologically specific banknote programs in the world. Lower denominations (5 and 10 dobras) are printed on polymer and feature endemic species such as the São Tomé shrew and the Principe prinia, while higher denominations (20 to 200 dobras) depict frogs, weaver birds, monkeys, and sunbirds unique to the islands. The polymer notes incorporate Safeguard® technology by De La Rue, including a transparent window shaped as a local butterfly (Charaxes defulvata), combining scientific illustration with advanced security engineering. Unlike portrait-driven currencies, the dobra places biodiversity at the center, transforming each note into a document of ecological identity.

For collectors

For collectors, the São Tomé and Príncipe Dobra offers a tightly structured and highly thematic field: large-denomination pre-2018 inflation notes, the clean break of the redenomination, and a modern fauna-focused series with precise species identification. The presence of Rei Amador across generations, combined with polymer innovation and limited island print runs, creates a rare intersection of history, technology, and natural science within African numismatics.

The São Tomé and Príncipe dobra remains the national currency, operating under a fixed peg to the euro.

Explore the São Tomé and Príncipe Dobra Banknotes Collection