| Oberliga West (1947-63) 1947/1948 - Appearances as Referee |  |
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| 07/03/1948 | FC Schalke 04 | - | Alemannia Aachen | 3:0 | - | - | - |
| Oberliga West (1947-63) 1947/1948 - Appearances as Referee | |
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| 07/03/1948 | FC Schalke 04 | - | Alemannia Aachen | 3:0 | - | - | - |
| Complete name: | Mertens |
| Born: | |
| Place of birth: |
Germany |
| Residence: | Krefeld |
| Nationality: |
Germany |