Bolivia

1981 International Stamp Exhibition “PHILEXFRANCE 82”

1981 International Stamp Exhibition “PHILATOKYO ’81”

1981 International Stamp Exhibition “ESPAMER ’81″”

1981 International Stamp Exhibition “WIPA 1981”

1981 Stamp Exhibition “EXFILMAR ’79”

1981 The 50th Anniversary of the First Airmail Between Bolivia & Brazil

1981 The 50th Anniversary of the First Airmail Between Bolivia & Brazil

1981 The 10th Anniversary of the Bolivian Philatelic Federation

1981 The 10th Anniversary of the Bolivian Philatelic Federation

1981 The 150th Anniversary of the Death of Gran Mariscal de Ayacucho