50000 Brazilian Cruzeiros Banknote (Oswaldo Cruz)

50,000 Cruzeiros Cruzeiro (Issued 1984-1986)

The Instituto Oswaldo Cruz, depicted on the reverse of this banknote, is one of Brazil’s most celebrated scientific institutions, founded in Rio de Janeiro at the turn of the twentieth century as a centre for biomedical research and public health. Its grand Moorish Revival main pavilion — known as the Castelo Mourisco — became an enduring symbol of Brazil’s commitment to science and medicine, making it a fitting centrepiece for the highest-denomination note of this late Cruzeiro series. The choice of both the institution and its founder for this note reflects the enormous national prestige attached to Oswaldo Cruz’s legacy in eradicating yellow fever and transforming public health in Brazil. Together, the portrait and the building create a thematically unified tribute to one of the country’s most significant scientific figures.

On the front, the dominant feature is an engraved portrait of Oswaldo Cruz, the pioneering Brazilian physician, epidemiologist, and bacteriologist, positioned to the right of centre. His name appears in small lettering directly beside the portrait. Cruz is depicted in formal attire with a jacket and high collar, his full moustache rendered with fine intaglio line work that gives the engraving considerable depth and texture. The overall colour palette of the front is warm rose and terracotta, with deeper reddish-brown tones used for the intaglio engraving of the portrait and the large numeral composition at the lower left. To the left of the portrait, an engraved vignette depicts a scientific microscope or optical instrument, rendered in careful detail and consistent with the medical-scientific theme of the note. At the upper left, the issuing authority is printed in bold capital letters: BANCO CENTRAL DO BRASIL, with the denomination 50000 appearing in the upper right corner. A large ornate rosette in deep reddish-purple and gold tones anchors the lower-left corner, serving as an anti-counterfeiting guilloché element. The denomination in full — “cinquenta mil cruzeiros” — runs across the lower section of the note in elegant serif typography, accompanied by the serial number A 2873001267 A printed twice. Two facsimile signatures of Banco Central officials appear in the lower centre of the note, and a small notation reading CASA DA MOEDA DO BRASIL is visible near the lower right edge, identifying the Brazilian Mint as the printer. The background is filled with fine guilloché lacework in pale pink and cream, providing visual complexity and a security underprint across the entire face.

The reverse centres on a large, finely engraved vignette of the Instituto Oswaldo Cruz’s Castelo Mourisco, the institution’s iconic Moorish Revival main building in Rio de Janeiro. The structure is rendered in considerable architectural detail, showing its twin towers with onion-shaped domes, ornate arched windows, decorative battlements, and the surrounding tropical garden with palm trees in the foreground. The engraving is executed in deep reddish-purple and mauve tones against a warm rose background, creating strong tonal contrast that highlights the building’s elaborate façade. The caption INSTITUTO OSWALDO CRUZ appears in small lettering beneath the vignette. To the left of the central scene, geometric guilloché patterns and a circular emblem or seal add visual structure and security detail. The denomination 50000 is printed in the upper right in dark numerals, while the full denomination CINQUENTA MIL CRUZEIROS appears in large serif capitals within a banner running across the lower portion of the note, rendered in deep brownish-purple ink against the warm background. Fine latticework and geometric patterns fill the margins, and a lightly printed watermark area is visible to the right of the central vignette.

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Other Brazilian Cruzeiros you can exchange: 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000.