Issued by the United States in 1945, this historic 5-cent commemorative marks the opening of the United Nations Conference in San Francisco on April 25, 1945. The stamp features the inscription “Toward United Nations” along with the name of Franklin D. Roosevelt, honoring his vision for global peace and cooperation. Printed in a classic blue engraved style, it reflects the optimism of the post-World War II era. A significant topical piece for collectors of U.N., peace, or WWII-era material, it remains a cornerstone issue in mid-20th-century U.S. philately. Clean margins and strong impressions are especially desirable.