Which 1926 U.S. coin featured Calvin Coolidge during the earlier 150th anniversary?

The 1926 U.S. Sesquicentennial half dollar featured Calvin Coolidge.

The coin commemorated the 150th anniversary of American independence. Its obverse showed George Washington alongside Calvin Coolidge, who was president at the time. The issue is notable because Coolidge became the only sitting U.S. president depicted on a U.S. coin during his lifetime until later exceptions involving other living people and commemorative issues.

The 1926 celebration provides historical context for America250. The United States’ 150th anniversary was called the Sesquicentennial, while the 250th anniversary is called the Semiquincentennial. The two words look similar but describe different milestones: 150 years and 250 years.

The coin should not be confused with the 1926 Sesquicentennial quarter eagle, a gold $2.50 coin issued in the same commemorative program. The half dollar is the specific issue associated with the paired portraits of Washington and Coolidge.