1988-12-26: National Meteorological Institute 100 Years

1988-11-28: 500 years discovery of America

1988-11-18: Birth Centenary of Omar Dengo

1988-10-17: 100 years of Women's University Education

1988-09-26: Pioneer of aviation

1988-09-16: Summer Olympic Games 1988 - Seoul

1988-06-27: Anglo-Costa Rican Bank 125 Years

1988-06-06: Joint issue with Liechtenstein

1988-04-10: International Red Cross and Red Crescent 125 Years

1988-02-01: IUCN General Assembly