George IV 18ct Gold Pocket Watch with Rose Cut Diamonds
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George IV 18ct cased key wind pocket watch, gilt dial with fusee movement rose cut diamond jewel set by Jane Mitchell, London case hallmarked London 1822, no dust cover 40 mm dia
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- Fusee - The fusee movement was used in clocks and pocket watches from the mid 17th century. The fusee is a cone shaped drum within the works that is linked to the barrel of the spring, usually by a length of chain.
As the mainspring loses its tension over time, the cone shaped barrel compensates for this by increasing the tension, by pulling the mainspring tighter, thus ensuring the time remains constant.
Use of the fusee in clocks was superseded by the "going barrel" in the mid 19th century and for pocket watches at the beginning of the 19th century.
The fusee continued to be used in marine chronometers until the 1970s. - George Iv - George IV (1762 ? 1830) was king of the United Kingdom of Great Britain and Ireland and king of Hanover from 1820, until his own death in 1830. From 1811 until his accession in 1820, he served as Prince Regent during his father's final mental illness.
In English furniture design, his reign from 1811 to 1830 is known as the Regency period. - Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
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