2004-11-20: Aromatic plants

2004-11-06: André Bello (1781-1865) and Spanish Grammar

2004-11-06: 150th Anniversary of the Buenos Aires Commodities Exchange

2004-10-23: Numismatics

2004-10-16: Christmas 2004

2004-09-18: Mercosur (2004) - Water Preservation

2004-09-18: Prevention of Uterine Cancer

2004-09-11: Centenary of Philatelic Association of Rosario

2004-09-11: Anniversary of towns foundation - Neuquén

2004-09-11: Centenary of Agronomy and Veterinary Science Institute, Buen

2004-08-21: Argentine Philately (2004) - Ships

2004-08-21: Legends and Popular Traditions of Argentina

2004-08-21: World Stamp Championship Singapore 2004

2004-08-07: Summer Olympic Games 2004 - Athens

2004-07-17: Assistance Dogs

2004-07-17: Fish of de Falkland Islands Area

2004-07-10: Humor and Cartoons - 2004

2004-06-12: The Circus

2004-06-05: Naval Hydrographic Service, 125th Anniversary

2004-05-22: World Philatelic Exhibition España 2004

2004-05-22: 100th Anniversary of FIFA

2004-04-17: Centenary of newspaper "La Voz del Interior", Córdoba

2004-04-17: Argentine Landscapes - 2004

2004-03-27: America - UPAEP (2004)

2004-03-27: UNESCO World Heritage

2004-02-21: Argentina in the Antarctic - 2004