This classic Chilean commemorative, issued in 1970, honors the 400th anniversary of La Araucana, the celebrated epic poem by Alonso de Ercilla, whose portrait dominates the design in rich engraved red. Printed by the Casa de Moneda de Chile, the stamp showcases exceptional line engraving, especially in the detailed armor and ruffled collar. A key issue for collectors of Latin American literature, historical personalities, and engraved portraiture. This example (based on your image) appears clean, well-centered, and with strong color—ideal for a quality thematic collection.