Repeating watch by Japy Frères et Cie., Germany, 1820

Record summary

Held and catalogued by German Clock Museum (object number Museu_ProvidedCHO_museum_digital_56249__technical_number_), this is a repeating watch by Japy Frères et Cie., made in Beaucourt, Germany, dated 1820. The Atlas places it in the Precision & Scientific Horology period (1750 – 1850) of its Pocket Watches collection. The record is illustrated with 1 photograph.

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

Repeating watches

Before electric light, telling the time in the dark was a real problem. Repeating watches strike the time on demand when a slide or push-piece is operated: quarter repeaters sound hours and quarters, minute repeaters hours, quarters and minutes. Edward Barlow and Daniel Quare disputed the invention in London in the 1680s. Early repeaters struck on a bell inside the case; Abraham-Louis Breguet introduced the gong (a coiled steel wire) around 1780, allowing thinner watches.

Repeaters require a separate train with racks, snails and a governor to control the striking speed, and are among the most demanding complications to make and adjust. Swiss makers of the Vallée de Joux specialised in repeating ébauches in the nineteenth century.

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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