| KNVB beker 1986/1987 - Appearances as Referee |  |
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 |
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| 14/04/1987 | FC Den Bosch '67 | - | Drechtsteden '79 | 3:1 | - | - | - |
| 04/05/1987 | AFC Ajax | - | FC Groningen | 0:0 | - | - | - |
| KNVB beker 1986/1987 - Appearances as Referee | |
|
|
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| 14/04/1987 | FC Den Bosch '67 | - | Drechtsteden '79 | 3:1 | - | - | - |
| 04/05/1987 | AFC Ajax | - | FC Groningen | 0:0 | - | - | - |
| Complete name: | John Blankenstein |
| Born: | 12/02/1949 † 25/08/2006 |
| Place of birth: |
Den Haag, 
Netherlands |
| Nationality: |
Netherlands |