Stjärnsunds manufakturverk was a Swedish mechanical manufacturing company, most known for its production of clocks. It was founded in 1700, in the town Stjärnsund near Hedemora, by inventor and industrialist Christopher Polhem (né Polhammar).[1]
Today, there is a company named Stiernsunds-ur which produces clocks according to Polhem's design, and performs repairs and maintenance on the originals.[2]