Swiss gold split seconds chronograph with recorder Circa 1915

Gold split seconds chronograph
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A Swiss gold split seconds chronograph, patented concentric 60-minute and 12-hour recorder; “Contetout”, 18k yellow gold, circa 1920.
18K Yellow gold, open face, keyless-winding, round-shaped, pocket watch.
White enamel dial with subsidiary seconds at 6, 1/5 second chronograph and steel spade hands, split seconds, dragging 60-minute recorder, concentric 12-hour recorder.
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Diameter: 50 mm
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Signed: No name
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Movement based on the the Swiss invention patent No. 71 222, delivered on June 2, 1915, to John Reymond, Vers-chez-Grosjean, Le Sentier (Vallée de Joux), for a “Mécanisme compteur appliqué à une pièce d’horlogerie à chronographe (Recorder mechanism applied to a chronograph timepiece), known as double tour d’heure.
Copies of the invention patent and advertisements.