Airmail - The 6th National Engineers' Congress, 1961 and 75th Anniversary of Colombian Society of Engineers 1962
Τώρα εμφανίζεται Κολομβία - Γραμματόσημα - 1962 - Airmail - The 6th National Engineers' Congress, 1961 and 75th Anniversary of Colombian Society of Engineers - 3 Γραμματόσημα.
1962
Airmail - The 6th National Engineers' Congress, 1961 and 75th Anniversary of Colombian Society of Engineers
12. Ιούνιος WM: Κανένα Σχέδιο: Mosdóssy Διάτρηση: 11½ x 12
![[Airmail - The 6th National Engineers' Congress, 1961 and 75th Anniversary of Colombian Society of Engineers, τύπος ACN]](https://www.stampworld.com/media/catalogue/Colombia/Postage-stamps/ACN-s.jpg)
![[Airmail - The 6th National Engineers' Congress, 1961 and 75th Anniversary of Colombian Society of Engineers, τύπος ACO]](https://www.stampworld.com/media/catalogue/Colombia/Postage-stamps/ACO-s.jpg)
![[Airmail - The 6th National Engineers' Congress, 1961 and 75th Anniversary of Colombian Society of Engineers, τύπος ACP]](https://www.stampworld.com/media/catalogue/Colombia/Postage-stamps/ACP-s.jpg)
