Catalog
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| Issuer | France |
|---|---|
| Year | 2015 |
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| Composition | Log in to see details |
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| Shape | Rectangular |
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| Obverse description | Central vignette presents a portrait of René Descartes (1596–1650), French philosopher, mathematician, and scientist, after a classical engraving style. Inscriptions identify the subject and denomination within a guilloche underprint, with the overprint legends NON VALABLE and ECHANTILLON confirming specimen status. |
|---|---|
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| Reverse description | Vignette incorporates a view of the Cathedral of Notre-Dame de Paris alongside a pen, a schematic rendering of the human brain, and a figure observing the night sky, evoking Descartes' philosophical and scientific legacy. A cursive Latin inscription renders his celebrated phrase from Principia Philosophiae (1644): Ego cogito, ergo sum. Specimen and essay overprints appear alongside the series notation U.128 and year 2015. |
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| Protection type | Watermark |
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