South America

1987 The 750th Anniversary of Berlin

1987 Space – Yury Gagarin & John Glenn

1987 Winter Olympic Games – Calgary, Canada

1993 Cave Art

1993 The 50th Anniversary of the Pedro Domingo Murillo Technical College, 1992

1993 The 400th Anniversary of the Quillacollo

1993 The 40th Anniversary of German Silver Coins & the 140th Anniversary of Bolivian Silver Coins

1993 Art

1993 Butterflies

1993 The 150th Anniversary of the First Brazilian Stamps