Peru National Flag with UPU Overprint

Peru · 1951 · S/. 1.00

The stamp features the national flag of Peru, with a red overprint 'U.P.U. 1874-1949' commemorating the Universal Postal Union's 75th anniversary. The denomination 'S/. 1.00' is displayed at the bottom.

This stamp, issued in 1951, commemorates the 75th anniversary of the Universal Postal Union (UPU), an international body crucial for global postal services. The overprint on a previously unissued flag design highlights Peru's recognition of this significant postal milestone.