Question: In what year did Hans Hilfiker design the swiss railway clock with Mobatime?

full_context: Document 1: History of watches: The history of watches began in 16th century Europe, where watches evolved from portable spring-driven clocks, which first appeared in the 15th century. Portable timepieces were made possible by the invention of the mainspring in the early 15th century. Nuremberg clockmaker Peter Henlein (or Henle or Hele) (1485-1542) is often credited as the inventor of the watch. He was one of the first German craftsman who made "clock-watches" ("taschenuhr"), ornamental timepieces worn as pendants, which were the first timepieces to be worn on the body. His fame is based on a passage by Johann Cochläus in 1511:
Document 2: Hans Hilfiker: Hans Hilfiker (15 September 1901 – 2 March 1993) was a Swiss engineer and designer. In 1944, working for the Swiss Federal Railways, he designed the Swiss railway clock, which became an international icon. The SBB clock was not Hilfiker's only contribution to modern living. He developed the concept of the fitted kitchen and was responsible for the standard Swiss dimensions for kitchen components (55/60/90 cm).
Document 3: David Hilbert: David Hilbert (] ; 23 January 1862 – 14 February 1943) was a German mathematician. He is recognized as one of the most influential and universal mathematicians of the 19th and early 20th centuries. Hilbert discovered and developed a broad range of fundamental ideas in many areas, including invariant theory and the axiomatization of geometry. He also formulated the theory of Hilbert spaces, one of the foundations of functional analysis.
Document 4: Swiss Army knife: The Swiss Army knife is a pocketknife or multi-tool manufactured by Victorinox AG (and up to 2005 also by Wenger SA). The term "Swiss Army knife" was coined by American soldiers after World War II due to the difficulty they had in pronouncing "Offiziersmesser", the German name.
Document 5: Self Winding Clock Company: The Self Winding Clock Company (SWCC) was a major manufacturer of electromechanical clocks from 1886 until about 1970. The Self Winding Clock Company clock mechanisms were truly revolutionary because the spring that powers the clock was not wound by hand but with an electric motor. The SWCC of New York was one of the first companies in the United States to successfully employ electric energy to power a clock. The winding motor is attached to, and mounted below, the conventional clock works. The unique feature of their patented clock mechanism is the automatic rewinding of the main spring each hour by the small electric motor. A contact switch mounted on the clock's center shaft is activated after the clock has run for one hour and the main spring is rewound one revolution. This rewinding occurs each hour. The power for the motor is supplied by batteries and the batteries last about one year before needing to be replaced. This clock mechanism never needed to be wound by hand and this eliminated the concern that someone may forget to wind the clock. Hence the company name, The Self Winding Clock Company.
Document 6: ETA SA: ETA SA Manufacture Horlogère Suisse (ETA SA Swiss Watch Manufacturer) designs and manufactures quartz watches and both hand-wound and automatic-winding mechanical ébauches and movements. Commonly referred to as ETA, the company is headquartered in Grenchen, Switzerland and is a wholly owned subsidiary of The Swatch Group Ltd.
Document 7: The Swatch Group: The Swatch Group is a Swiss manufacturer of watches and jewelry. The company was founded in 1983 by Nicolas Hayek from the merger of Allgemeine Gesellschaft der Schweizerischen Uhrenindustrie (ASUAG) and Société Suisse pour l'Industrie Horlogère (SSIH).
Document 8: Nicolas Hayek: Nicolas George Hayek (19 February 1928, Beirut – 28 June 2010, Biel/Bienne), was a Swiss-Lebanese entrepreneur, co-founder, CEO and Chairman of the Board of the Swatch Group, with principal headquarters in Biel/Bienne.
Document 9: Gaby Schreiber: Gaby Schreiber, born in Austria, 1916. Studied art and stage and interior design in Vienna, Florence, Berlin, and Paris. She was a leading British industrial and interior designer. Was General Consultant Designer for Industry; specialist in Colour Consultancy and Interiors; advisor on purchases of works of art; Chairman Gaby Schreiber & Associates. In the 1960s she headed a small empire that comprised three companies: Gaby Shreiber and Associates, design firm; Convel Ltd, a trading company; and Convel Design International, a European design company based in Brussels. But, her empire had its start in the late 1940s. She arrived in Britain just before the Second World War, and designed for the plastics industry during wartime. After the war, she continued designing in plastic, producing kitchen and catering equipment, tableware, cutlery, and other products for cafeterias and food chain stores such as Mark & Spencer, as well as designing plastics for building structures and components. In the late 1940s she had set up her design office, building a team of specialists from different fields-interior designers, engineers, architects, graphic designers. She died in 1991.
Document 10: Hartmut Esslinger: Hartmut Esslinger (born June 5, 1944) is a German-American industrial designer and inventor. He is best known for founding the design consultancy Frog Design Inc. (stylized as "frog").
Document 11: Swiss railway clock: The Swiss railway clock was designed in 1944 by Hans Hilfiker, a Swiss engineer, together with Mobatime, a clock manufacturer, for use by the Swiss Federal Railways as a station clock. In 1953, Hilfiker added a red second hand in the shape of a railway guard's signaling disc.
Document 12: Swatch: Swatch is a Swiss watchmaker founded in 1983 by Nicolas Hayek, and is subsidiary of The Swatch Group. The product line was developed as a response to the "quartz crisis" of the 1970s and 1980s, in which Asian-made digital watches were competing against traditional European-made mechanical watches.
Document 13: Longines: Longines (] , ) is a luxury watch company based in Saint-Imier, Switzerland. Founded by Auguste Agassiz in 1832, it is currently owned by the Swatch Group. Its winged hourglass logo is the oldest registered trademark for a watchmaker.
Document 14: Fritz Hansen: Fritz Hansen, also known as Republic of Fritz Hansen, is a Danish furniture design company. Designers who have worked for Fritz Hansen include Arne Jacobsen (1902–1971), Poul Kjærholm (1929–1980), Hans J. Wegner (1914–2007) and Piet Hein (1905–1996). Fritz Hansen also collaborates with contemporary furniture architects including Hiromichi Konno, Cecilie Manz, and Kasper Salto.
Document 15: Good Design: The Good Design movement was an artistic movement or design concept that originated in the 1930s, but took form principally in the United States immediately after the Second World War. Designs made under the influence of Good Design include buildings and furniture, but also everyday objects such as kitchen implements, household objects and garden tools. Names associated with the movement include Charles and Ray Eames, László Moholy-Nagy and Hans Wegner,
ground_truth: 1944