JOHN ROGER ARNOLD No.386: An eight-day marine chronometer movement and bowl, circa 1824, with later lever escapement, the silvered dial signed and numbered Arnold, London 386, Roman hour chapters, subsidiary seconds and up-and-down dial 0-8, blued steel hands, crescent-shaped main frame assembly carrying reversed fusee and barrel inscribed No. 386 Jr. R. Arnold, London, sub-frame assembly carrying the remainder of the train and escapement, lever escapement, later cut bi-metallic balance, circular heat compensation weights, flat spiral balance spring, in brass bowl with screw-on bezel

THE PROPERTY OF A PRIVATE COLLECTOR

細節

JOHN ROGER ARNOLD No.386: An eight-day marine chronometer movement and bowl, circa 1824, with later lever escapement, the silvered dial signed and numbered Arnold, London 386, Roman hour chapters, subsidiary seconds and up-and-down dial 0-8, blued steel hands, crescent-shaped main frame assembly carrying reversed fusee and barrel inscribed No. 386 Jr. R. Arnold, London, sub-frame assembly carrying the remainder of the train and escapement, lever escapement, later cut bi-metallic balance, circular heat compensation weights, flat spiral balance spring, in brass bowl with screw-on bezel
Dial diameter: 92mm

拍品專文

This chronometer has a 14400 train and having a lever escapement therefore beats ¼ seconds. There is a slot in the sub-frame assembly which would have accommodated an Arnold spring detent, however the inner end now carries a small plate which carries the top pivot at the lever, the bottom pivot being in a potence screwed to the pillar-plate. t