Pocket watch by De St. Leu, Daniel, England, 1797

Record summary

Held and catalogued by Science Museum Group, London (object number L2015-3246), this is a watch; striking train; verge escapement by De St. Leu, Daniel, made in London, Greater London, England, United Kingdom, London, dated 1797. The Atlas places it in the Precision & Scientific Horology period (1750 – 1850) of its Pocket Watches collection. Recorded dimensions: overall: 80 mm x 62 mm x 29.5 mm. The record is illustrated with 2 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

Verge and pair-cased watches

After Christiaan Huygens and Robert Hooke applied the balance spring around 1675, the verge watch became a reasonably reliable timekeeper and the minute hand became standard. Through the eighteenth century the typical English watch was a pair-cased verge: a fusee movement with a pierced, engraved balance cock, housed in an inner case and a separate protective outer case, often of repoussé gold, shagreen, tortoiseshell or enamel.

French watches of the same period were thicker 'oignons', later replaced by elegant thinner watches following Jean-Antoine Lépine's bar-bridge calibre of c. 1770. Dutch, Swiss and German makers supplied international markets, and verge watches were made until the mid-nineteenth century as cheaper alternatives to the cylinder and lever.

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.

Read next:FuseeBalance spring (hairspring)Verge escapement