Swiss ankerchromometer with chronograph and counter Circa 1915

Gold Chronographe Antimagnetique by Longines
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A Swiss 18 carat gold open faced ankerchronometer with chronograph and counter, Chronographe Antimagnetique, circa 1915. Very fine lever chronometer movement, intermediate wheel, chronograph and counter, 3/4 plate, calibre. Cuvette inscribed Longines 5 Grands Prix Paris-Anvers-Paris Milan Bruxelles Chronographe Anti-Magnétique. White enamel dial with black Arabic hours and seconds, blue tachymeter scale and red telemeter scale, 30-minutes counter, subsidiary seconds, gold hands. Plain case. Case numbered, dial, cuvette and movement signed.
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Diameter: 52 mm
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Weight: 92 g
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Signed: Longines