Rare Swiss chrome cased navigational stopwatch Circa 1955

Kenmerk: BA1964
Diameter: 50 mm

Estimate: € 2.000 - 4.500
Price sold: € 2.250

Chrome stopwatch with chronograph and register by Breguet
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A fine and rare Swiss chrome cased open faced keyless lever navigational stopwatch with chronograph and instantaneous 60-minute register, made in the 1950’s. Sold to Marine Nationale Aeronautique Navale. Brushed, nickel-plated movement, 18 jewels, straight-line lever escapement, monometallic balance, self-compensating blued steel Breguet balance spring, index regulator, chronograph with visible work, co axial button on the winding crown. Black painted dial with white Arabic numerals, outer seconds and fifths of a second chronograph division, outer five-second Arabic numerals, subsidiary seconds and instantaneous 60-minute register, original white painted poire hands. Case with screwed down milled bezel and back, the back engraved Marine Nationale Aeronautique Navale 0042-B Breguet. Accompanied by the original fitted wooden deck box.
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Diameter: 50 mm
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Signed: Breguet
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The navigational stopwatch was used in conjunction with the aircraft’s octant, an instrument similar to a ship’s sextant used to measure the angular elevation of a celestial body with respect to the horizontal plane when the navigator was making observations to determine the aircraft’s position. In an aeroplane, particularly at sea, quite often, that which appears to be the horizon is not a true horizon but a false horizon due to the atmospheric conditions, such as strata of haze or clouds.

Signed: Marine Nationale Aeronautique Navale 0042-B Breguet