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 | |||||
|---|---|---|---|---|---|---|---|
| 02-08 | 12 | Grote Scheldeprijs Schoten (1.1) | |||||
 Giro d'Italia (2.HC) | |||||||
| 21-05 | 7 | Stage 4Genova - Viareggio (241.0km) | |||||
| 30-04 | 8 |  Amstel Gold Race (CDM) | |||||
| 12-04 | 3 |  GP de Denain (1.1) | |||||
| 07-04 | 10 | De Brabantse Pijl (1.3) | |||||
| 06-03 | 4 | Ronde van Limburg (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 |