This commemorative pair from Colombia, issued in 1989, marks the 170th anniversary of the Liberation Campaign of 1819, a decisive milestone in the independence of northern South America. The stamps portray two central leaders of the independence struggle: Francisco de Paula Santander, “Jefe de Vanguardia,” and Simón Bolívar, “Comandante en Jefe.” Each 40-peso stamp reproduces historic museum portraits, emphasizing their military leadership and historic partnership in the liberation of New Granada (modern Colombia). Collectors value this pair for its historical significance, classic portrait design, and role in Colombia’s independence commemorative issues. Well-preserved mint pairs are especially desirable for thematic collections on independence movements, Latin American history, or military leadership.