George III Gold Pocket Watch by Robert Roskell, Liverpool

• Chapter Ring - A separate metal plate on the face of a clock, on which the numerals for the hours and sometimes parts of the hours, are displayed, usually wheel shaped and sitting on top of the dial plate. The chapter ring is often a feature of the clock and can be silvered or enamelled to stand as a contrast to its background. The hours are usually shown in Roman numerals, although in the late 19th and earlt 20th century, Arabic numerals became fashionable.
• 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  Use of the fusee in clocks was superseded by the "going barrel" in the mid 19th century and for pocket watches at the beginning of the 19th century.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.
• Hunt & Roskell - Hunt & Roskell, were a firm of manufacturing and retail jewellers and silversmiths, founded in 1843 by Robert Roskell a famous pocket watch maker from Liverpool, and John Samuel Hunt who had previously been in partnership with silversmith Paul Storr, trading Storr & Co. (1819-22), Storr & Mortimer (1822-38), Mortimer & Hunt (1838-43) and then Hunt & Roskell (1843-97).
  
  Hunt & Roskell had retail premises at 156 New Bond Street and a manufacturing workshops at 26 Harrison Street, near Clerkenwell.
  
  They were among the finest of the Victorian silversmith, manufacturing in the high Victorian style, and their craftsmanship was recognised by their appointment as silversmiths and jewellers to Queen Victoria.
  
  John Samuel Hunt continued as a partner until his death in 1865, when he was succeeded by his son, John Hunt (d.1879). Robert Roskell remained in the firm until his death in 1888. In 1889 the firm was taken over by J.W. Benson and continued in business as Hunt & Roskell Ltd until c.1965.
• Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
• Guilloche - A form of classical decoration consisting of a repeating ornament of interlacing curved bands, sometimes forming circles, and further decorated with rosettes or other flower forms.
  
  The name is derived from the inventor, French engineer Guillot, who invented a mechanical method of inscribing fine repeating patterns on to metallic surfaces.
  
  On enamelled items with guilloche decoration, the surface is firstly engraved with the repeating pattern, and then covered with several layers of enamel, each of which is fired.
  
  Where the item has not been enamelled the form of decoration is usually called "engine turned".
• George Iii - George III (1738 - 1820) was King of Great Britain and Ireland from 1760 to 1820.

This item has been included into following indexes:

• pocket watches, case type - open face, gold / gold-plated case 1,339
• Roskell, Robert (Britain) - pocket watches 10