Well finished fullplate fusee movement jewelled to the 3rd, with cap jewels on balance (diamond) and escape. Earnshaw-type chronometer escapement with original footed spring-detent and gold passing-spring. Rare early example of a compensation balance having round weights, with additional timing screws. 8-turn blued-steel helical balance-spring. One-piece signed enamel dial, blued-steel hands. 50. 5 mm diameter. Now housed in a well made two-piece lacquered brass drum with screw bezel and flat sides that allows it to be placed on a beautiful silver mounted ebony desk stand, the base measuring 6 cm in diameter and a total height of 12 cm when the drum is in place.
John Poole, a most important chronometer maker, brother of James and his son James U Poole, all famous London chronometer makers. John committed suicide in 1867, his name continuing to be used by the family.
NB: This is a particularly early form of balance having round weights which became the standard for most English makers in the second half of the 19th century. The present drum casing is not new and may well be over 100 years old itself, looking to have been done by someone who was employed in making bowls for box chronometers.
Some damage to the edge of the dial, no doubt caused by over-tightening the bezel by an unfortunate past owner and the present replacement hands are not worthy of such a fine movement, both of which can be remedied. Otherwise a most attractive re-housing of a chronometer movement by this famous and highly respected maker, and one which can be easily wound and admired safely in a modern domestic setting. Not serviced by me but winding and going well, the balance having a fine action.