Rare early cylinder movement by the inventor, circa 1740.
Fullplate fusee movement of typical Graham caliper, with beautifully engraved cock and slide plate, the cock with un-pierced foot. Cylinder (dead-beat) escapement retaining the original but broken 13-tooth brass escape. Steel balance, blued-steel balance-spring. Later enamel dial in undamaged condition, fitted to a later purpose made brass-edge, gold hands. 43 mm diameter.
George Graham, successor to Thomas Tompion, Fleet Street, London, had perfected the cylinder escapement by 1726 and used this in all his watches from then on, without exception, until he died in 1751 - Graham number 5999, a verge, is a fake. The earliest known surviving cylinder is number 5182.
NB. Graham, justly recognised as one of the greatest clock and watchmakers, introduced his new dead-beat escapement for clocks around 1715 and for his watches in 1726. The clock version is still extensively used and the watch form was used by Swiss and French makers well into the 20th century, making this one of the most historically important escapements.
The escape wheel with two missing teeth and the hour hand incomplete. Otherwise retaining the original motion work and the cock thankfully not having been permanently disfigured by being filed down to provide a later form of banking - many have. Not working, but certainly important enough to warrant restoration.
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