1960 Scott #1146 – 4¢ SEATO / Unity, Peace, Progress – Canceled

Commemorative U.S. postage stamp issued in 1960 to honor the Southeast Asia Treaty Organization (SEATO), a Cold War-era alliance formed to prevent communist expansion in Southeast Asia. Timed to coincide with SEATO’s sixth annual conference held in Washington, D.C., from May 31 to June 3, 1960, the stamp features the SEATO emblem—a globe and laurel branch—alongside the words “Unity, Peace, Progress.” Lightly mounted with stamp hinge tape, removable without damage. No gum disturbance unless noted.
Features:
- Denomination: 4 cents
- Issue Year: 1960
- Scott Catalog No. 1146
- Occasion: SEATO Sixth Annual Conference
- Subject: Southeast Asia Treaty Organization
- Design: Blue background with SEATO emblem and motto
- Cancel Type: Black circular and wavy line cancellation
- Fit Notes: Standard commemorative size; ideal for collectors of Cold War history, international diplomacy, or alliance-themed stamps