Approx. Ø50mm, approx. 113g, protective housing covered with ray skin, inner housing 18K, London Hallmarks 1781, signed and number-equivalent dust cover, exquisite, signed cylinder work with diamond cover, enamel dial, steel pointer, walkable, but urgently need cleaning. John Ellicott (jun.) led his business first on Austin Friars Street EC2 and later on Swithin's Alley on the Royal Exchange. In 1738 he was elected a member of the Royal Society. He showed great interest in scientific topics and entertained an observatory at his home in Hackney. He became known mainly for his work on temperature-compensated pendulums and the use of cylinder inhibition. His high craftsmanship led to his appointment as watchmaker of King George III.