Rare Swiss split-seconds chronograph with counter Circa 1915

Steel open faced chronograph by Timing & Repeating Watch Co
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A rare Swiss steel open faced split-seconds chronograph lever pocket watch with counter, circa 1915. Highly complicated precision movement, the plate inscribed Pat. Dec. 1885, lever escapement, fine adjusting device. The original white enamel dial is in perfect condition, with Arabic numerals, subsidiary seconds, a split-seconds chronograph, and a rare 15-minute counter. Plain steel case. Dial signed.
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Diameter: 53.5 mm
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Weight: 100 g
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Signed: Timing & Repeating Watch Co Geneva
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Timing & Repeating Watch Company was a Swiss manufacturer of chronographs. Kathleen H. Pritchard writes in ‘Swiss Timepiece Makers 1775-1975’ that the Timing & Repeating Watch Co in Geneva manufactured chronographs almost identical to Waltham’s 1884 model with a mechanism by H.A. Lugrin (a patent from 1876 and 1880). It also mentions the possible connections between Timing & Repeating Watch Company, Henry Alfred Lugrin Sr, Longines and Albert C. Wittnauer.