Julien le Roy Ottoman Pocket Watch
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Large silver consular cased pocket watch for the Ottoman market, by Julien le Roy, Paris. Early 19th century unmarked silver 66 mm case. Verge fusee movement, signed on the backplate and dial. White enamel dial with Turkish numerals, rail track minutes and outer Turkish numerals at 5-minute divisions. With Mexican silver watch chain.
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- Back Plate - On many types of clocks, the movement operates between two plates, usually made of brass, one at the back, and the other at the front, which forms a mount for the dial.
On English bracket, mantle and table clocks the backplate was often visible through a glass door or panel from the late 17th century, and could be profusely engraved with scrolling decorations, flowers, foliage, birds, and figures. The engraving could also include the maker?s name.
The amount of engraving reduced and became simpler as the 18th century progressed, and by 1800, had been reduced to a border, often with the maker's name in the centre. By the early 1800s all decoration had ceased, and only the maker's name was added, and by the Victorian era, most bracket, mantle and table clocks had no engraving. - 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Use of the fusee in clocks was superseded by the "going barrel" in the mid 19th century and for pocket watches at the beginning of the 19th century.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. - Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
This item has been included into following indexes:
- pocket watches, case type