A Regency mahogany eight-day seconds beating chronometer Bench Timer

ARNOLD (UNNUMBERED): CIRCA 1810

細節

A Regency mahogany eight-day seconds beating chronometer Bench Timer
Arnold (unnumbered): circa 1810
The white enamel dial signed Arnold, London, gold Breguet hour and minute hands, subsidiary seconds dial (at VI), Vector up-and-down dial (at XI), vector regulating index dial (at III) with Arabic numerals inscribed SLOW 5,10 et seque, 30 FAST, the movement wound through the centre of the up-and -down dial, setting-up of the barrel throught the centre of the regulating dial, blued steel hands, full-plate movement with five pinned pillars, Earnshaw escapement, mounted between the dial and the pillar-plate the balance cock with index arm for regulating together with three-armed solid brass flat-rim balance with six vertically positioned brass cheese-head screws, bi-metallic steel-on-brass arc with pin at the lower end bearing against outer coil of the flat blued steel balance spring additionally controlled via the index arm, stop/start assembly engaged with a pin beneath one of the balance arms operated via a square ended arbor throught the dial (beneath VI), spring foot detent with steel locking pallet mounted on banking block positioned on the inside area of the pillar plate, very large barrel and balance bridge, the whole contained in brass drum mounted in a mahogany cube box with locking bezel and flat glass
120mm. diam : case 165 x 165 x 105mm
On the inside of the back cover to the brass drum mounting;
R H Percy
Feb 2, 1883
London S.W
Examined by Saltmarsh
June 1883
April 1858

拍品專文

It is unusual for the balance of a chronometer to be positioned immediately behind the dial and the pillar-plate.
There are a series of now vacant holes in the top-plate that indicate that a balance and balance cock were at one time mounted thereon, however there is no key-slot cut in the top-plate to accommodate an Arnold-type spring detent.
There is no winding square on the inner end of the fusee thus indicating that the movement has always been wound through the dial.