That is a Vacuum Wiper and is correct for your car. It is not electrically operated. In your first photo you can see a 'tube' close to the speed adjuster. In your car that is connected to a similar shaped outlet on the inlet manifold by a rubber pipe that is nicely fitted around the pillar and scuttle. Correct for cars prior to about 1935. On hills, the wiper can slow down a lot, so the hand operating lever can allow a way to overcome the problems in poor conditions.
Various A7 parts suppliers, like The Seven Workshop, can sell you the correct length and type of pipe if you give them details of your model.
Various A7 parts suppliers, like The Seven Workshop, can sell you the correct length and type of pipe if you give them details of your model.