This commemorative airmail pair was issued by Paraguay to celebrate the 150th anniversary of its independence (1811–1961). The design features the modern United Nations Building, symbolizing Paraguay’s participation in the global international community during the post-war era. Printed by the Casa de Moneda de Chile, the stamps are presented in two denominations—30c (red) and 18.15c (green)—sharing the same architectural design but differing in color for postal usage distinction. The clean engraved architectural style reflects the optimistic internationalist spirit of the early 1960s. As a thematic pair, these stamps are attractive to collectors of UN themes, architecture, and independence commemoratives.