Located in Nottingham, GB
Radiating engine turning decorates the bright silver dial of this open-face pocket watch, presenting slender Roman hour numerals within an outer beaded minute track. Blued steel Breguet moon hands indicate the time, accompanied by an offset subsidiary seconds dial positioned unusually beside the three o’clock chapter. The slim 18-carat yellow gold case spans 46 mm in diameter, accented by reeded engine turning across the middle band and fine concentric guilloché engraving across the rear cover surrounding a polished, unengraved circular central cartouche.
At the neck, a robust gold suspension bow frames an inventive pump-winding mechanism operated via a flat-topped gold button on a polished steel shaft. Pulling this pendant stem outward engages the suspended going barrel, turning the winding arbor roughly one-sixth of a full rotation with each individual stroke. Protecting the interior, the plain inner gold cuvette features dedicated access apertures for setting the hands and winding via a conventional watch key, bearing the stamped PM maker's mark of Clerkenwell casemaker Philbert Mathey.
The gilded Lepine calibre movement displays individual bar bridges secured by blued steel screws, operating with a duplex escapement and polished steel Geneva stopwork. Steady timekeeping is maintained through a plain three-arm steel balance with a blued spiral hairspring, complemented by a polished index regulator arm and a protective garnet endstone jewel on the balance cock. Hallmarked in London in 1832, the primary barrel bridge is neatly and clearly engraved with the signature of reputable retailers Webster and Son of London.
Although distributed under Webster’s signature, the ingenious pump-action construction is credited to London watchmaker Charles Viner. Viner modified Joseph Berollas’s chain-operated system, replacing delicate links with a direct, spring-loaded reciprocating plunger. This durable arrangement improved substantially upon earlier patented pump-winding concepts by Robert Leslie and Edward Massey...
Category
Antique Early 19th Century Scientific Instruments