R12 Literature
| R12 1942 | Owners Manual |
| R12 Single Carb | Technical Data |
| R12 Twin Carb | Technical Data |
| R12, R17 | Spare parts list, illustrations only |
| R12, R17 | Parts List—German |
| R12 1942 | Owners Manual |
| R12 Single Carb | Technical Data |
| R12 Twin Carb | Technical Data |
| R12, R17 | Spare parts list, illustrations only |
| R12, R17 | Parts List—German |