A fine quality antique English regulator with Graham's deadbeat escapement, jewelled pallets, maintaining power, trapezoidal beat adjustment to the crutch, and pivot capped screw adjustment to the back plate. Silvered dial with standard regulator, 212 cm high. Provenance: Bonhams & Goodman, 'The Melbourne clock Museum', 29th April 2008, ($33,000)
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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.
- Maintaining Power - A horological term to describe a subsidiary driving force such as a spring or additional weight in a clock, which keeps the movement going while the mainspring is being rewound.
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