| Friendlies 1983 - Appearances as Referee |  |
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| 25/10/1983 | Switzerland | - | Yugoslavia | 2:0 | 1 | - | - |
| Friendlies 1983 - Appearances as Referee | |
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| 25/10/1983 | Switzerland | - | Yugoslavia | 2:0 | 1 | - | - |
| Complete name: | Jean Koster |
| Born: | |
| Place of birth: |
Luxembourg |
| Nationality: |
Luxembourg |