United States Presidential Seal Pin. Die Struck Brass, with enamel color fills, gold plated and epoxy coated. The Seal of the President of the United States is used to mark correspondence from the President to the Congress. This is the symbol of the Presidency. A highly important design based on the Great Seal of the United States with the official coat of arms. This design is the same that appears on the Presidential Flag. Each pin includes a clutch back and is individually poly bagged.