BERTHOUD, FERDINAND. A RARE AND IMPORTANT MARINE CHRONOMETER HORL:A LONGIT PAR FERDINAND BERTHOUD NO. XXX CIRCA 1800

2
3
4
2
3
4
Lot №: 98996
Estimate: $20,000 - 20,000
24 May 2018
Sold price
$68 750

Description

full brass plates for fusee and going train, Harrison's maintaining power, unusual pivoted detent escapement,  bi-metallic blade for temperature compensation pushing on a levered device for temperature regulation through a set curb pins, balance arbor with six large anti-friction wheels for balance pivots bearings, wound and set through the crystal • three silvered matte dials for hours, minutes and seconds, Roman numerals for the hour, ratchet-wheel knob to lock balance• set within a cylindrical bowl fitted with glazed aperture to reveal the balance, mounted within circular gimbals, 'quick release' latches, mahogany box, brass details and carrying handles • dial plate signed and numbered
dial diameter 9.0cm; height of box 22cm