1991-12-19: Christmas 1991

1991-11-30: Andean Condor (Vultur gryphus)

1991-11-30: UN (United Nations), 40th Anniversary

1991-11-19: National Population and Housing Census

1991-10-12: America Issue: voyages of discovery

1991-09-09: ECOBOL, Postal Security System

1991-09-05: Rally Tarija Cobija

1991-08-29: Meeting of Peruvian and Bolivian Presidents

1991-08-21: Bolivian Philatelic Federation, 20th Anniv.

1991-08-12: Meeting of Argentinian and Bolivian Presidents

1991-08-05: Meeting of Uruguayan and Bolivian Presidents

1991-07-15: La Paz Cathedral

1991-06-14: Opening of the road "Heroes of the Chaco."

1991-06-13: International Stamp Exhibition ESPAMER '91

1991-05-31: WWF: Spectacled Bear

1991-03-01: Bolivian Radio Club, 50th Anniv.