Antique Oscan Onken Arts & Craft Oak Shelf Clock

Hi , I recently bought this Antique Arts And crafts 8 day time only Clock Manufactured By Oscar Onken at my local Flea Market I purchased this clock with out its original pendulum ( not Running ) I would love to know more about this manufacture and what year it may have been manufactured also can anyone send me a link of a picture of what pendulum this my have originally,thanks for viewing