95th Auction
2017/5/6
Lot 309
Thomas Earnshaw, London / Robert Roskell, Liverpool, 58 mm, 162 g, circa 1803
A very fine pair-cased pocket chronometer with spring detent escapement t and sugar-tongs temperature compensation
Case: 18k rose gold, case maker's punch mark "HL". Dial: enamel. Movm.: full plate movement, chain/fusee, polished steel escape wheel, three-arm steel balance.
The company Robert & John Roskell in Liverpool was established in 1803, when the two brothers took over the business of Robert Roskell’s father-in-law. We know that Thomas Earnshaw created movements for Roskell and that the movement of this watch - with its characteristic sugar-tong compensation curb and the spring detent chronometer escapement - was also created in Earnshaw’s workshop.
Thomas Earnshaw (1749 - 1829)
He began his training in watchmaking in 1763 and from 1780 on produced watches for Brockbanks. Around 1781 he invented the spring detent escapement in his workshop which would be used essentially universally for more than 150 years. In 1794/95 Earnshaw took over William Hughes' company in High Holborn. For his enhancements of the escapement Earnshaw is generally considered a pioneer in chronometer making. His company produced about 3000 pocket watches and about 1500 marine and pocket chronometers of the highest quality.
A very fine pair-cased pocket chronometer with spring detent escapement t and sugar-tongs temperature compensation
Case: 18k rose gold, case maker's punch mark "HL". Dial: enamel. Movm.: full plate movement, chain/fusee, polished steel escape wheel, three-arm steel balance.
The company Robert & John Roskell in Liverpool was established in 1803, when the two brothers took over the business of Robert Roskell’s father-in-law. We know that Thomas Earnshaw created movements for Roskell and that the movement of this watch - with its characteristic sugar-tong compensation curb and the spring detent chronometer escapement - was also created in Earnshaw’s workshop.
Thomas Earnshaw (1749 - 1829)
He began his training in watchmaking in 1763 and from 1780 on produced watches for Brockbanks. Around 1781 he invented the spring detent escapement in his workshop which would be used essentially universally for more than 150 years. In 1794/95 Earnshaw took over William Hughes' company in High Holborn. For his enhancements of the escapement Earnshaw is generally considered a pioneer in chronometer making. His company produced about 3000 pocket watches and about 1500 marine and pocket chronometers of the highest quality.
estimated
8.000—15.000 €
Price realized
-