1951-12-11: Nationalization of Barranca Oil Companies

1951-10-20: Guillermo Valencia, 8th Anniv. of Death

1951-10-01: Issues for AVIANCA Airline

1951-09-15: Issues for LANSA Airline

1951-05-01: Red Cross

1951-01-30: Colombian Society of Engineers, 60th Anniv.

1951: Surtax for Construction of Communication Building