Browse Lots

Global notice COVID-19 Important notice
French. A silver paircase pocket chronometer with "sugar tongs" temperature compensation

SIGNED FRENCH, ROYAL EXCHANGE, LONDON, NO. 226, 1810

Details
French. A silver paircase pocket chronometer with "sugar tongs" temperature compensation
Signed French, Royal Exchange, London, no. 226, 1810
The frosted gilt chain fusee movement with Earnshaw spring detent escapement, flat steel three-armed balance and flat blued steel hairspring with diamond endstone, with bimetallic sugar tong temperature compensation fitted to the regulation, the cream coloured dial with Roman numerals, large subsidiary seconds, gold hands, in plain inner and outer cases, movement and dial signed
58 mm. diam.
London 1810

Lot Essay

Although the bimetallic balance had already been introduced for temperature compensation in precision timepieces, it was difficult to fuse the brass and steel lamina. The 'sugar tongs' system was easier to make but proved less accurate and was consequently short lived. Its rarity makes it an interesting collectors' piece.
;

More from Watches

View All
View All