The Etzold & Popitz clock factory was founded in Leipzig in 1864. It was initially located at Reichsstraße 45 and moved to Querstraße 6 in 1882. In addition to clocks, the company made mechanical musical instruments and music boxes. One well-known example is the Lipsia carousel, a music box made around 1903 and exported to the Orient through the distributor Popper & Co. The factory trademark depicted a stylised silhouette of Leipzig’s Monument to the Battle of the Nations, with a clock face and the DUFA name. Etzold & Popitz registered DUFA (“Deutsche Uhrenfabrik”, German Clock Factory) as a trademark in 1920. From 1912, DUFA clock production continued in Schwenningen, while cases were made in Mühlhausen in Thuringia. DUFA Deutsche Uhrenfabrik Leipzig/Mühlhausen merged with Kienzle Uhrenfabriken AG in 1931.