Fancy 18ct Hunter Cased Pocket Watch by W. Ehrhardt London
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18ct hunter cased key wind small pocket watch, fancy gilt dial Roman numerals fusee movement with 18ct dust cover and ornately engraved outer covers by W Ehrhardt London 40 mm dia
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- Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
- Hunter - A hunter pocket watch is the type where the case includes a spring-hinged circular metal lid or cover, that closes over the glass face of the watch, protecting it from dust, scratches and other damage or debris. The majority of antique and vintage hunter-case watches have the lid-hinges at the 9 o?clock position, suiting the right handed user.
- 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Use of the fusee in clocks was superseded by the "going barrel" in the mid 19th century and for pocket watches at the beginning of the 19th century.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.
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