1990-12-27: Winter Olympic Games 1992 - Albertville

1990-12-14: Introduction of Express Mail Service (EMS)

1990-12-13: Visit of President Carlos Salinas de Gortari of Mexico

1990-12-01: National Philatelic Exhibition EXFIVIA ’90

1990-11-29: Council of Andean States´s Presidents, 4th Ed.

1990-11-29: Visit of President Rodrigo Borja Cevallos of Ecuador

1990-11-20: Reunification of Germany

1990-11-20: Christmas 1990: Children´s Rights

1990-10-19: Larecaja District, 4th Cent.

1990-10-12: Discovery of America, 5th Cent.

1990-10-12: America Issue: Nature by time of the discovery

1990-09-14: Cochabamba Social Club, Cent.

1990-07-06: National Society for telecommunications, 25th Anniv.

1990-06-29: Bolivian Chamber of Commerce, Cent.

1990-06-02: Peter Paul Rubens, 350th death Anniv.

1990-05-18: Helvetic Confederation, 7th Cent.

1990-05-16: FIFA World Cup 1990 - Italy

1990-05-13: Postage Stamps, 150th Anniv.

1990-04-16: Sucre City, 450th Anniv.

1990-04-14: Organization of American States, Cent.

1990-03-18: Opening of the Berlin Wall

1990-01-23: Fight against drugs