Chile

1991 Naval Tradition – The 75th Anniversary of Pardo’s Rescue of Shackleton Expedition

1991 The 100th Anniversary of “Rerum Novarum”, Papal Encyclical on Worker’s Rights

1991 World Telecommunications Day

1991 National Monuments

1991 Expoerts – Issues of 1989 Surcharged

1991 Easter Island Art – Issues of 1988 Surcharged

1991 Traditional Crafts

1991 The 100th Anniversary of Scientific Society

1991 Coal Mining

1991 America Cup Football Championship