French gold chronograph with 30 minute counter Circa 1910

Gold chronograph attributed to LeCoultre & Cie
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A fine, French manual wind open faced pocket watch with chronograph and 30 minute counter, circa 1910. Frosted gilt movement, lever escapement. Polished 18K yellow gold case. Enamel dial with Roman radial hours, Arabic minutes/seconds, track with Arabic five minute/second numerals, subsidiary dial for the seconds, 30 minute counter, and original pear hands.
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Diameter: 51 mm
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Signed:No name
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The patent number stamped on the movement plate is 34029, deposited by LeCoultre in 1905 for the instantaneous chronograph minute counter.