This striking 1969 French commemorative features a faceted diamond symbolizing the immeasurable value of water, set within stylized green and blue water droplets. Issued to promote the European Water Charter, the design emphasizes conservation and the shared responsibility of protecting water resources. Engraved in the classic French intaglio style, it showcases exceptional linework by artist Jean Combette. A key thematic issue for environmental and Europa-related collections, often admired for its symbolic artwork and vibrant shading.