| Gran Premio del Belgio |
Edizioni della Classe 350 non valide per il motomondiale
| 1921 | Spa-Francorchamps | René KIEKEN (BEL) | - |
|---|---|---|---|
| 1922 | Spa-Francorchamps | E. REMINGTON (GBR) | - |
| 1923 | Dinant-Feschaux | Jean HUYNEN (BEL) | - |
| 1924 | Spa-Francorchamps | Paddy JOHNSTON (IRL) | - |
| 1925 | Spa-Francorchamps | Wal HANDLEY (GBR) | - |
| 1926 | Spa-Francorchamps | Frank LONGMAN (GBR) | - |
| 1927 | Spa-Francorchamps | Jimmie SIMPSON (GBR) | - |
| 1928 | Spa-Francorchamps | J. TREBORG (BEL) | - |
| 1929 | Spa-Francorchamps | Wal HANDLEY (GBR) | - |
| 1930 | Spa-Francorchamps | Ernie NOTT (GBR) | - |
| 1931 | Spa-Francorchamps | Jimmie GUTHRIE (GBR) | - |
| 1932 | Spa-Francorchamps | Jimmie SIMPSON (GBR) | - |
| 1933 | Spa-Francorchamps | Jimmie GUTHRIE (GBR) | - |
| 1934 | Spa-Francorchamps | Jimmie SIMPSON (GBR) | - |
| 1935 | Spa-Francorchamps | John WHITE (GBR) | - |
| 1936 | Florette | Ted MELLORS (GBR) | - |
| 1937 | Spa-Francorchamps | John WHITE (GBR) | - |
| 1938 | Spa-Francorchamps | John WHITE (GBR) | - |
| 1939 | Spa-Francorchamps | Ted MELLORS (GBR) | - |
Classe 350
| 1949 | Spa-Francorchamps | Freddie FRITH (GBR) | VELOCETTE |
|---|---|---|---|
| 1950 | Spa-Francorchamps | Bob FOSTER (GBR) | VELOCETTE |
| 1951 | Spa-Francorchamps | Geoff DUKE (GBR) | NORTON |
| 1952 | Spa-Francorchamps | Geoff DUKE (GBR) | NORTON |
| 1953 | Spa-Francorchamps | Fergus ANDERSON (GBR) | MOTO GUZZI |
| 1954 | Spa-Francorchamps | Ken KAVANAGH (AUS) | MOTO GUZZI |
| 1955 | Spa-Francorchamps | Bill LOMAS (GBR) | MOTO GUZZI |
| 1956 | Spa-Francorchamps | John SURTEES (GBR) | MV AGUSTA |
| 1957 | Spa-Francorchamps | Keith CAMPBELL (AUS) | MOTO GUZZI |
| 1958 | Spa-Francorchamps | John SURTEES (GBR) | MV AGUSTA |