Mexico 100 pesos Mariposa Monarca KM-537 Fauna Butterfly proof silver coin 1987

This Mexico 100 Pesos 1987 KM-537 proof silver coin celebrates the monarch butterfly, one of the most recognizable species associated with Mexico’s natural heritage. The wildlife-themed reverse creates a striking composition with nine monarch butterflies shown in flight at different angles, their wings rendered with fine veins and patterned markings. The inscriptions “plata .720,” “mariposa monarca,” the 1987 date, $100 denomination and Mo Mexico City mint mark complete the design. The obverse features Mexico’s national coat of arms: a powerful eagle with spread wings grasping a snake while standing on a prickly pear cactus, accompanied by oak and laurel branches, a tied ribbon, “ESTADOS UNIDOS MEXICANOS” and a beaded border. Monarch butterflies are renowned for their extraordinary long-distance migration, with vast numbers reaching central Mexico for winter. The Proof finish gives the silver coin reflective fields and sharply defined wildlife details, making this an appealing collectible for admirers of Mexican fauna, butterflies and world numismatics.

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