Info
| Last name | Jongen |
| First name | Constant |
| Nationality |  Belgium |
| Date of birth | 12-03-1940 |
| Age | 85 |
| Place of birth | Mechelen-Bovelingen |
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
| 13-10 | 9 | Nationale Sluitingsprijs Putte-Kapellen (1.1) | |||||
| 17-09 | 5 | Kampioenschap van Vlaanderen (1.1) | |||||
 Giro d'Italia (2.HC) | |||||||
| 21-05 | 5 | Stage 6Parma - Verona (100.0km) | |||||
| 19-05 | 4 | Stage 4San Pellegrino Terme - Parma (189.0km) | |||||
| 17-05 | 6 | Stage 2Riva del Garda - Brescia (146.0km) | |||||
| 26-04 | 43 | Paris - Brussel (1.1) | |||||
| 01-04 | 10 | De Brabantse Pijl (1.3) | |||||
Teams
| Year | Team |
|---|---|
| 1967 | Mann - Grundig |
| 1966 | Mann - Grundig |
| 1965 | Lamot - Libertas |
| 1964 | Flandria - Romeo |
| 1963 | Faema - Flandria |
Victories
| This year | 0 |
| Total | 0 |