1988-12-18: Bridges

1988-12-02: Khmer Culture

1988-11-07: Reptiles

1988-10-10: Orchids

1988-09-06: Insects

1988-08-05: Land Snails

1988-06-10: International Stamp Exhibition FINLANDIA '88, Helsinki

1988-04-24: Space Exploration

1988-04-14: International Stamp Exhibition ESSEN '88

1988-03-15: Domestic Cats (2nd Issue)

1988-02-02: Summer Olympic Games 1988 - Seoul (II)

1988-01-07: Winter Olympic Games 1988 - Calgary (II)

1988-01-07: Water Projects