Hersteller im Baujahr 1931
| ID_manu | year_from | ID | Name | Name | Ort |
|---|---|---|---|---|---|
| 1.646 | 1.931 | 1.646 | R.M.W. | R.M.W. | Neheim-Ruhr |
| 2 | 1.931 | 2 | BMW | BMW | München |
| 4 | 1.931 | 4 | Harley-Davidson | Harley-Davidson | Milwaukee |
| 26 | 1.931 | 26 | Moto Guzzi | Moto Guzzi | Mandello del Lario |
| 9 | 1.931 | 9 | Ariel | Ariel | Birmingham |
| 3.925 | 1.931 | 3.925 | Triumph (D) | Triumph (D) | |
| 12 | 1.931 | 12 | BSA | BSA | Birmingham |
| 29 | 1.931 | 29 | Z | Zündapp | Nürnberg |
| 8 | 1.931 | 8 | Norton | Norton | Birmingham |
| 30 | 1.931 | 30 | Hercules | Hercules | Nürnberg |
| 305 | 1.931 | 305 | Ardie | Ardie | Nürnberg |
| 50 | 1.931 | 50 | Brough Superior | Brough Superior | Nottingham |
| 111 | 1.931 | 111 | Imperia | Imperia | Bad Godesberg |
| 363 | 1.931 | 363 | Nestoria | Nestoria | Nürnberg |
| 105 | 1.931 | 105 | D-Rad | D-Rad | Berlin |
| 449 | 1.931 | 449 | Coventry Victor | Coventry Victor | Coventry |
| 394 | 1.931 | 394 | Dunelt | Dunelt | Sheffield |
| 260 | 1.931 | 260 | New Imperial | New Imperial | Birmingham |
| 55 | 1.931 | 55 | FN | FN | Herstal |
| 65 | 1.931 | 65 | Horex | Horex | Bad Homburg |
| 57 | 1.931 | 57 | Husqvarna | Husqvarna | Husqvarna |
| 34 | 1.931 | 34 | Indian | Indian | Springfield |
| 17 | 1.931 | 17 | Jawa | Jawa | Prag |
| 108 | 1.931 | 108 | Gillet Herstal | Gillet Herstal | Herstal |
| 118 | 1.931 | 118 | Sarolea | Saroléa | Herstal |