Info
| Last name | Demuysere |
| First name | Jef |
| Nationality |  Belgium |
| Date of birth | 26-07-1907 |
| Place of birth | Wervik |
| Passed away | 30-04-1969 |
| Age when passed away | 61 |
| Place of passing | Antwerpen |
Monuments
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
 Tour de France (2.HC) | |||||||
| 4 |  Standings | ||||||
| 27-07 | Stage 21Malo-les-Bains - Paris (300.0km) | ||||||
| 09-07 | 3 | Stage 8Hendaye - Pau (146.0km) | |||||
| 04-07 | 3 | Stage 3Dinan - Brest (206.0km) | |||||
| 25-05 | 2 | Paris - Brussel (HIS) | |||||
| 17-05 | 3 | Bordeaux-Paris (HIS) | |||||