1955 The 7th Postal Union Congress of the Americas and Spain 1955 Airmail – The 7th Postal Union Congress of the Americas and Spain 1955 The 100th Anniversary of the Death of Jose Eusebio Caro, 1817-1853 1955 Airmail – The 100th Anniversary of the Death of Jose Eusebio Caro, 1817-1853 1955 Airmail – Stamps for Domestic Airmail and 700th Anniversary of Salamanca University 1955 Airmail – Stamps for Domestic Airmail – Previous Issues Overprinted “EXTRA-RAPIDO”, “CORREO”, or Surcharged 1956 Local Motives 1956 Local Motives 1956 Local Motives 1956 Columbus Memorial Lighthouse 1956 Airmail – Columbus Memorial Lighthouse 1956 The 700th Anniversary of St. Elizabeth of Hungary 1956 Airmail – The 700th Anniversary of St. Elizabeth of Hungary 1956 The 400th Anniversary the Death St. Ignatius of Loyola, 1491-1556 1956 Airmail – The 400th Anniversary the Death St. Ignatius of Loyola, 1491-1556 1956 Pereira Commemoration 1956 Airmail – Pereira Commemoration 1957 Previous Issue Overprinted “EXTRA RAPIDO” 1957 Airmail – Not Issued Stamps Overprinted “EXTRA RAPIDO” 1957 The 25th Anniversary of Agricultural Credit Bank