1950-era bike (brand ceased to exist in 1962)....
The pedal sprocket is on the other side. The big grey disk is a clutch. The little button opposite to the pedal and partly hidden by the foot stand is is used to engage/disengage the engine. In regular usage it's engaged, so the engine turns when you pedal and this is how the engine is started. If the engine doesn't start, you disengage it, and you are left with a rather heavy pedal bike.
The pedal sprocket is on the other side. The big grey disk is a clutch. The little button opposite to the pedal and partly hidden by the foot stand is is used to engage/disengage the engine. In regular usage it's engaged, so the engine turns when you pedal and this is how the engine is started. If the engine doesn't start, you disengage it, and you are left with a rather heavy pedal bike.