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100 Colones Inter-American Human Rights Convention, Reverse Trial Strike

Issuer Costa Rica
Year 1970
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Composition Gold plated brass
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Obverse script Latin
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Reverse description The reverse is an entirely blank, unadorned field with no devices, legends, or inscriptions, consistent with a trial strike or uniface pattern produced to test the obverse die. The surface exhibits a broad, flat expanse with a visible rim, characteristic of a piece struck solely to assess the obverse design.
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Additional information

Trial strikes — pruebas de reverso — occupy an odd corner of Latin American numismatics: produced for official approval of a reverse design before final dies are committed to production, they exist in tiny numbers and rarely enter public circulation at all. This piece relates to Costa Rica's 1969 hosting of the Inter-American Specialized Conference on Human Rights, the meeting that produced the American Convention on Human Rights, signed in San José that November.

Gold-plated brass was standard for trial pieces of this period, allowing the mint to assess die detail without committing to precious metal.

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