Inscribed EXTRA RAPIDO.
Numbered souvenir sheet of one imperforate stamp.
The Pan American Road Congress, meeting in 1957 in Panama, studied the possibility of linking the countries through a large highway. In the Eighth Congress of 1959, with headquarters in Bogotá, the Colombian support was given to the route, starting at the Panamanian border, at the point called Palo de letras (stick of letters). The Congress of the Republic protocoled the proposal of the eighth Pan American Road Congress with Law 121 of 1959, whose first article says the following: "The road Palo de Letras- Mercua-Bahía Solano-Isthmus of San Pablo-Asia-Manizales-Bogotá, will be considered as the sector of the Panamerican Highway between the border of Panama and the capital of Colombia. "
