George IV silver and tortoiseshell triple cased verge pocket watch for the Turkish market by Edward Prior, London, hallmarked London 1825

Record summary

Catalogued by Gardiner Houlgate (auction house), Corsham (lot Sale 86, lot 567), this is a pocket watch by Edward Prior, made in London, England, dated 1825 (hallmarked London). The Atlas places it in the Precision & Scientific Horology period (1750 – 1850) of its Pocket Watches collection. Materials and techniques recorded by the source: silver, tortoiseshell. Recorded dimensions: Diameter 63 mm. 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

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:Balance spring (hairspring)Verge escapement