| Name | Issues/Designs | |||
| 6th ASEAN Orchid Congress | 1986 | — | - ... | |
| Asia-Europe Meeting 1996 | 1996 | — | - ... | |
| 4th Asia-Pacific Orchid Conference | 1992 | — | - ... | |
| 2nd International Asian Hornbill Workshop | 1996 | — | - ... | |
| 5th SEAPAL Congress of Rheumatology | 1984 | — | - ... | |
| 2nd U.N. Conference on the Exploration and Peaceful Uses of Outer Space | 1982 | — | - ... | |
| 12th World Congress of Gastroenterology | 2002 | — | - ... |