Colombia

1978 Definitive Issue

1977 Airmail – Previous Issue Surcharged

1977 Airmail – The 90th Anniversary of Society of Colombian Engineers

1977 Airmail – The 150th Anniversary of Cauca University

1977 The 100th Anniversary of the Birth of Dr. Federico Lleras Acosta, 1877-1938

1977 City Crest

1977 The 90th Anniversary of “El Espectador” Magazine by Fidel Cano

1977 Popular Education

1977 Airmail – The 200th Anniversary of National Library

1977 Airmail – The 20th Anniversary of Female Suffrage