This elegant $50 airmail stamp from Chile, issued in 1957, commemorates the 400th anniversary of Juan Ladrillero’s 1557 expedition through the Strait of Magellan. The design, printed in deep green, features a stylized map of the strait with an old navigational compass rose, symbolizing exploration and maritime discovery. Ladrillero’s voyage helped chart one of the world’s most challenging passages, linking Chile’s national heritage to its seafaring past. The issue was printed by Casa de Moneda de Chile and remains a sought-after classic among collectors of Chilean airmail and exploration-themed stamps.