1949 The 1st Forestry Congress, Bogota WM: 4 1949 The 50th Anniversary of the Death of Francisco Javier Cisneros, 1836-1898 1950 Airmail – Stamps for the Airline LANSA 1950 Airmail – Previous Issues Overprinted A = “Avianca” 1950 Airmail – Previous Issues Overprinted L = “Lansa” 1950 The 75th Anniversary of U.P.U. – Inscribed “1874 UPU 1949” – Orchids and Cityscapes 1950 The 75th Anniversary of U.P.U. – Inscribed “1874 UPU 1949” – Orchids and Cityscapes 1950 Airmail – The 75th Anniversary of U.P.U. – Inscribed “1874 UPU 1949” – Orchids and Cityscapes 1950 Antonio Baraya, 1768-1816 1950 Local Motives
1949 The 1st Forestry Congress, Bogota WM: 4 1949 The 50th Anniversary of the Death of Francisco Javier Cisneros, 1836-1898 1950 Airmail – Stamps for the Airline LANSA 1950 Airmail – Previous Issues Overprinted A = “Avianca” 1950 Airmail –...