50 Colones Series C

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背面描述	Intaglio-printed central vignette of the Casa Amarilla (Yellow House), a neoclassical government building rendered in fine line engraving with cypress and tropical trees framing the facade. A large Ceiba tree occupies the right portion of the composition, with a repeated guilloche pattern of the numeral 50 arranged vertically along the left margin.
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防伪类型	Watermark
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备注	The Series C 50 Colones was introduced as Costa Rica's central bank worked to modernize its note series through the early 1970s, with Thomas De La Rue providing the security printing infrastructure that smaller Latin American central banks routinely contracted out during this period. The five-year date range reflects staggered release batches rather than a single continuous print run — a common De La Rue practice when fulfilling multi-year supply contracts. Watermarking was the sole mechanical security feature on this issue, a relatively modest specification even by 1972 standards.

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