Swiss staybrite stainless steel lever dress watch Circa 1940

Chronograph with register, tacho- and telemeter
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A rare Swiss, stainless steel Staybrite keyless dress watch, circa 1940. With chronograph, tachometer, telemeter and instantaneous 45-minute registers. A polished and brushed case, inclined bezel, snap-on back. Silvered dial with applied steel baton indexes, outer minutes and fifths of a second numerals. The outermost blue telemeter scale calculated for 1000 meters, the blue inner tachometer scale, subsidiary dials for seconds, 45-minute registers and steel lozenge hands. Nickel-plated movement, 17 jewels, straight-line lever escapement, monometallic balance with timing screws, Breguet balance spring, index regulator, chronograph with visible work, and push pieces on each side of the pendant.
Dial, movement and case signed.
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Diameter: 40 mm
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Thickness: 12 mm
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Signed: Zenith  Le Locle
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Zenith SA is a Swiss luxury watchmaker. The company was founded in 1865 by Georges Favre-Jacot in Le Locle in the canton of Neuchâtel and is one of the oldest continuously operating watchmakers. Favre-Jacot invented the concept of ‘in-house’ movements, believing that only through control of the entire watchmaking process, perfection could be achieved. Zenith was purchased by LVMH (Moët Hennessy Louis Vuitton) in November 1999, becoming one of several brands in its watch and jewellery division which includes TAG Heuer and Hublot.