| WC Qualifiers Europe 1968/1969 - Appearances as Referee |  |
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| 23/10/1968 | Northern Ireland | - | Turkey | 4:1 | - | - | - |
| WC Qualifiers Europe 1968/1969 - Appearances as Referee | |
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| 23/10/1968 | Northern Ireland | - | Turkey | 4:1 | - | - | - |
| Complete name: | Wilhelmus Jacobus Maria Schalks |
| Born: | 21/03/1923 † 25/10/2017 |
| Place of birth: |
Leiden, 
Netherlands |
| Residence: | Leiden |
| Nationality: |
Netherlands |