Ochs und Junior Perpetual Calendar (Pre-Owned)No one I know is considered more renowned for their work of the Perpetual Calendar complication than Ludwig Oechslin. Most perpetual calendars utilize numerous delicate levers and springs which are usually very sensitive to shock and long term use. Recognizing this, Mr. Oeschlin designed a perpetual with a far more practical approach. Utilizing gears instead of levers and springs, he was able to create a clever and reliable movement adding just 9