150th Anniversary of Omani-American Friendship (1840-1990)

Issued in 1990, this stamp commemorates the 150th anniversary of diplomatic relations between Oman and the United States, marking the historic voyage of the Omani ship Sultanah to New York in 1840. The mission, dispatched by Sultan Said bin Sultan, carried Oman's first envoy to the United States and established one of the earliest formal diplomatic relations between an Arab state and America. The design features the sailing ship Sultanah alongside portraits of Sultan Said bin Sultan and Oman's envoy Ahmed bin Na'aman Al Kaabi, celebrating this milestone in international diplomacy.

By issuing this commemorative stamp, the Sultanate of Oman highlighted its longstanding tradition of maritime trade, diplomacy, and international engagement. The issue celebrated 150 years of friendship and cooperation between Oman and the United States, emphasizing the historical significance of the 1840 mission as a symbol of peaceful relations, cultural exchange, and mutual respect between the two nations.