| Cup Winners Cup 1978/1979 - Appearances as Referee |  |
 |
 |
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| 27/09/1978 | Aberdeen FC | - | DFS Marek Stanke Dimitrov | 3:0 | - | - | - |
| 31/10/1978 | Shamrock Rovers | - | TJ Baník Ostrava OKD | 1:3 | - | - | - |
| Cup Winners Cup 1978/1979 - Appearances as Referee | |
|
|
||||
| 27/09/1978 | Aberdeen FC | - | DFS Marek Stanke Dimitrov | 3:0 | - | - | - |
| 31/10/1978 | Shamrock Rovers | - | TJ Baník Ostrava OKD | 1:3 | - | - | - |
| Complete name: | Johannes Nicolaus Ignacius Keizer |
| Born: | 06/10/1940 † 18/11/2024 |
| Place of birth: |
Volendam, 
Netherlands |
| Nationality: |
Netherlands |