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500 Francs Pole vault
| Issuer | National Bank of Rwanda |
|---|---|
| Year | 2008 |
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| Composition | Log in to see details |
| Weight | 15.55 g |
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| Obverse description | Log in to see details |
|---|---|
| Obverse script | Latin |
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| Reverse description | Log in to see details |
| Reverse script | Latin |
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| Additional information |
Rwanda's National Bank commissioned this piece as part of a broader Olympic sports series timed to the Beijing Games. Niobium — a refractory metal more commonly found in steel alloys and superconductor research than in coinage — produces the distinctive colored surface without applied paint or plating; the hue develops through anodization, with voltage controlling the oxide layer thickness and therefore the final color.