Service symbolized by a blue-and-white eagle
The Post Horse seal served as the official logo until 1970, when President Nixon signed the Postal Reorganization Act and the familiar bald eagle claimed the spotlight. The eagle is pictured in flight above the inscription U.S. Mail with nine five-pointed stars at the base and United States Postal Service around three sides.
The Postal Services iconic blue and white eagle isnt the only insignia that has represented the organization throughout its history.
In 1782, Postmaster General Ebenezer Hazard chose Mercury, the Greek messenger of the gods, to represent the organization.