Original 1974 United States commemorative stamp block of four issued for the 100th anniversary of the Universal Postal Union (1874–1974).

The stamps feature classic artworks representing letter writing and communication across cultures, including works attributed to Donne, Terborch, Raphael, and Hokusai.

This is an unused block of four with attached selvage, suitable for collecting, display, or framing.

Condition is very good overall with light toning consistent with age. Please review photos for exact condition.

A nice example of U.S. postal history and art-themed philately.