Chronograph by Francillon und Cie (Longines), Switzerland, c. 1920

Record summary

Held and catalogued by German Clock Museum (object number 47-2723 (inventory number) 58024 (technical number)), this is a chronograph by Francillon und Cie (Longines), made in Switzerland, dated c. 1920. The Atlas places it in the Golden Age of Mechanical Watchmaking period (1900 – 1945) of its Instruments collection. Recorded dimensions: Höhe: 5.20 cm, Breite: 4.00 cm, Tiefe: 1.20 cm, Durchmesser: 3.60 cm. The record is illustrated with 5 photographs.

Assembled from the source record's structured fields. Dates and attributions are given as the source states them; where a field is missing the Atlas leaves it blank rather than estimating.

Catalogue description

Atlas type guide

Chronographs and split-seconds watches

A chronograph is a watch with an additional seconds hand that can be started, stopped and returned to zero independently of the timekeeping. Louis Moinet built an early example in 1816 and Nicolas Rieussec a recording 'chronographe' in 1821; Adolphe Nicole's heart-shaped reset cam (patented 1862) made the modern return-to-zero possible. Split-seconds (rattrapante) chronographs add a second hand that can be stopped for intermediate times; flyback chronographs restart instantly.

Chronographs were essential tools for doctors (pulsometer scales), artillery (telemeter), engineers and sport. In wristwatches, Valjoux, Venus, Lemania and later the automatic chronographs of 1969 (Zenith El Primero, the Chronomatic Calibre 11 group and Seiko 6139) are milestones.

General guidance written by the Atlas editors about this kind of object. It is not a statement about this particular piece; for that, rely on the source record above and on physical examination.

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