A shaving apparatus has at least one cutting unit having an outer shaving surface for contacting the skin, interrupted by hair entry apertures, an internal cutter which is drivable for movement along the hair entry apertures for cutting off hairs projecting through the hair entry apertures. An outer gearbox input shaft embodied as a hollow shaft surrounds an inner gearbox input shaft, and a synchronization device is provided inside the gearbox. There are no extra or added processing steps added for forming the alignment mark structure because it is formed concurrently while forming features in the circuit region.