It is the wiper motor from the donor beetle your Rometsch was made from. Check the Chassis number on your pan... the year of that chassis is the year wiper motor you have. Just glass bead the steel base it is attached to and repaint it... then attach a new wiper motor to it.
I researched my 56 Beeskow... and the chassis was originally under a sunroof 56 beetle that left Wolfsburg for a dealer in... wait for it... Berlin! What a surprize.
Eric
protect me from what I want