Capped fullplate fusee movement with finely pierced and engraved Kendal pattern cock, the slide-plate covering the hidden second signature, cap jewels on balance (diamond) and escape. Duplex escapement retaining its original ruby roller, with the rare feature of ‘sliding’ banking. Steel balance with spiral balance-spring and detachable stud, and with the firm’s most sophisticated balance-brake using a pin mounted on a sprung lever between the plates, a sign of top quality finishing. Beautiful enamel dial with seconds at 6, outside minute track and ‘Vulliamy dots” at every five minutes. 46 mm diameter, 14.5 mm deep.
Justin Vulliamy and son Benjamin, Clockmakers to King George III and the Prince Regent, later George IV, suppliers of best quality clocks and watches to the English aristocracy, the new Houses of Parliament as well as many London clubs and institutions.
NB: The code used by this firm changed from three to four letters between 1810-15, this being one of the firm’s last movements to bear three letters. The surviving Vulliamy records show that this watch, in a gold case, was delivered to a Mr Hermitage in 1813 and cost 42 guineas.
Sliding banking, in which the banking pin is on a partially rotating tube mounted on the staff, allows the balance an arc of well over 360 before hitting the fixed pin set in the edge of the escapement hole. This sophisticated system dates back to the earlier work of Thomas Mudge and indicates a sound knowledge of the problems of acceleration to a watches rate when overly large balance arcs mean that banking takes place.
Lacking hands and dial with small edge chip at ‘2.’ Otherwise the movement in good, complete and original condition but rather dirty. The chain is present but unhooked and although the staff is intact the balance is not swinging freely. Sold as needing at least a service to work properly, and priced accordingly.