Swiss chronograph with register telemeter and tachometer Circa 1935

Staybrite stainless steel  lever chronograph by Eberhard & Co
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A fine, very rare and large Swiss Staybrite stainless steel open faced chronograph lever pocket watch with 30-minute register, telemeter and tachometer, made in the 1930s. Rhodium-plated movement, straight-line lever escapement, monometallic balance, self-compensating Breguet balance spring, index regulator. Silver dial with painted Arabic numerals, outer silver-painted seconds divisions, telemeter scale and outermost tachometer scale, subsidiary dials for the 30-minute register and seconds, original blued steel Breguet hands. Polished and brushed case, inclined bezel, flat band, co axial button in the crown for the start/stop and return-to-zero function of the chronograph, pusher-shaped slide at 2 o’clock for locking the chronograph. Dial, case and movement signed, case and movement numbered.
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Diameter: 55 mm
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Signed: Eberhard & Co La-Chaux-de-Fonds
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Eberhard & Co SA, Swiss watch manufacture
This Swiss watch company, Eberhard & Co SA, was founded in 1887 by Georges-Emile Eberhard in La Chaux-de-Fonds; in the same year, he presented his first pocket chronograph. In 1907, the Eberhard manufacture headquarters were inaugurated on Rue Léopold Robert in La Chaux-de-Fonds. In 1919 the sons Georges and Maurice Eberhard took over the management. From 1919 Eberhard also became the official supplier of the Royal Italian Navy. In 1926 they took over the company completely. Eberhard & Co has been a specialist in wrist chronographs since the 1920s. The most famous Eberhard watches are the chronographs: Extra-fort, Aviograf and Tazio Nuvolari.