the first Mercedes models, led by the 60, the most famous early model, and officially adopted Mercedes as its automobile trademark; capable of 120 km/h (75 mph), the 60 combined touring and racing capacity, and was the top-status car to own (or for other makers, among them Berliet, Rochet-Schneier, Martini, Ariel, Star and FIAT, to copy; in the U.S., Daimler Manufacturing Company {Long Island City, New York} may have built one under licence in association with Steinway). In part due to the model 60's success, the number of DMG employees went from 821 (1903) to 2,200 (1904). 1906 to 1913 were further expansion years, with the creation of new capacity reducing the number of external suppliers. Increased mechanization took the annual productivity from 0.7 cars per worker, to 10. In 1911, shares of DMG were listed on the Stuttgart stock exchange. Berlin-Marienfelde On October 2, 1902, DMG opened a new works in the mountainous region to the south of Berlin. Its scope was initially limited to motorboat and marine engines. Later, it expanded into making trucks (1905) and fire trucks (1907). The region became a centre of the automobile industry, and other businesses moved in. Untertürkheim Untertürkheim was an ideal location to site a large factory as it was close to both the Neckar river and the Stuttgart–Ulm railway. The local Mayor Eduard Fiechtner sold the land (185,000 square meters) at a low price and also arranged for a railroad extension with its own station and energy from the Neckar's hydro-electric plant which had been built in 1900. DMG had planned to open the facility in 1905 but the total destruction of Cannstatt's factory by fire in 1903 hastened the work and the new Art-Nouveau building, with a jagged-roof, was brought forward to start production in December 1903. The work force continued to grow. On May 17, 1904, Unterturkheim became DMG's headquarters with the rest of the administration staff moving in on 29 May. In 1913, an additional 220,000 square meters were acquired and between 1915 and 1918 it was extended further. By the 1920s, Untertürkheim had almost all the production processes on one site from foundries to final car assembly. In 1925 the DMG design department also moved in. The Cannstatt Fire (1903) On the night of June 10, 1903, the original Seelberg-Cannstatt plant suffered a great fire. All the machinery and 93 finished Mercedes cars, a quarter of