A toy organ‐stop, prevalent in N. Eur. c. 1500–1800. It comprised a revolving star near the top of the organ‐case with a set of tuned or untuned bells attached to a wind‐blown driving‐wheel behind the case. It was an effect often used on feast days. There is a Zimbelstern on the org. of the chapel of St John's Coll., Cambridge.