1959 Airmail – The Death of Jeorge Gaitan, 1898-1948 – Unspent Stamps Surcharged 1959 Airmail – Previous Issue Surcharged 1959 Local Motives WM: 5 1959 Airmail – Unification of Airmail Rates – Overprinted “UNIFICADO” 1959 Airmail – Unification of Airmail Rates – Overprinted “UNIFICADO” 1959 The 100th Anniversary of Colombian Stamps – Inscribed “1859 1959” 1959 Airmail – The 100th Anniversary of Colombian Stamps – Inscribed “1859 1959” 1959 Airmail – The 100th Anniversary of Colombian Stamps – Inscribed “1859 1959” – Domestic Airmail WM: 5 1959 The 40th Anniversary of Colombian “AVIANCA” Airmail Services 1959 Airmail – The 40th Anniversary of Colombian “AVIANCA” Airmail Services 1959 Airmail – The 40th Anniversary of Colombian “AVIANCA” Airmail Services 1960 The 100th Anniversary of the Death of Alexander von Humboldt, 1769-1859 1960 Airmail – The 100th Anniversary of the Death of Alexander von Humboldt, 1769-1859
1959 Airmail – The Death of Jeorge Gaitan, 1898-1948 – Unspent Stamps Surcharged 1959 Airmail – Previous Issue Surcharged 1959 Local Motives WM: 5 1959 Airmail – Unification of Airmail Rates – Overprinted “UNIFICADO” 1959 Airmail – Unification of Airmail...