South America

1991 Architecture

1991 Airmail – Atlantic Sailfish

1991 Airmail – Pre-Columbian Art

1991 Pre-Columbian Art

1991 The 2nd Anniversary of the Death of Luis Carlos Galan Sarmiento, 1943-1989

1991 The 200th Anniversary of the Birth of Colonel Atanasio Girardot, 1791-1813

1991 The 2nd Anniversary of the Death of Dario Echandia Olaya, 1897-1989

1991 New Constitution

1991 Airmail – Whale

1991 Airmail – Butterflies