| Production Years: | 1932 - 1937 |
| Maximum Speed: | 95 km/h |
| Engine: | Four-stroke (M.A.G., built under licence) |
| Cylinders: | 1 |
| Capacity: | 500 cc |
| Bore x Stroke | 82 mm x 92 mm |
| Power: | 13 PS |
| Control: | Side-valve |
| Gears: | 3-speed |
| Suspension Front | Girder fork |
| Suspension Rear | Rigid |
| Tyres: | 26 x 3.5 |
| Weight: | 160 kg |
The OHV sports version of this model is the STM500.
