1977 Airmail – Opening of Philatelic Museum, Medellin
1977 Airmail – Opening of Philatelic Museum, Medellin
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1976 The 150th Anniversary of Panama Congress
1976 The 150th Anniversary of Panama Congress
1976 The 200th Anniversary of Independence of the United States of America
1976 The 200th Anniversary of Independence of the United States of America
1976 The 50th Anniversary of Colombian Rotary Club
1976 The 50th Anniversary of Colombian Rotary Club
1976 Airmail – Inauguration of Avianca Jumbo Jet Service
1976 Airmail – Inauguration of Avianca Jumbo Jet Service
1976 Airmail – The 100th Anniversary of Telephone
1976 Airmail – The 100th Anniversary of Telephone