| Cup Winners Cup 1988/1989 - Appearances as Referee |  |
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| 06/09/1988 | Derry City | - | Cardiff City | 0:0 | - | - | - |
| Cup Winners Cup 1988/1989 - Appearances as Referee | |
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|
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| 06/09/1988 | Derry City | - | Cardiff City | 0:0 | - | - | - |
| Complete name: | John Blankenstein |
| Born: | 12/02/1949 † 25/08/2006 |
| Place of birth: |
Den Haag, 
Netherlands |
| Nationality: |
Netherlands |