A Fine example of a Monval Montchanin Wagon Wall clock, the embossed brass frame with putti and floral decoration, the enamelled face with Roman numeral and gold hands, a brass embossed pendulum with enamelled raised flower in centre surrounded by embossed decoration, 143 cm tall
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- Embossed / Repousse - Embossing, also known as repousse, is the technique of decorating metal with raised designs, by pressing or beating out the design from the reverse side of the object.It is the opposite of chasing, where the decoration is applied from the front. An embossed or repoussed object may have chasing applied to finish off the design.
- Putto / Putti / Amorino / Amorini - A putto (plural: putti) or amerino (plural: amerini) is a cherub or cupid frequently appearing in both mythological and religious paintings and sculpture, especially of the Renaissance and Baroque periods and later used as a decorative element in the design of furniture, ceramics, statuary etc. They are usually depicted as chubby males, or of indeterminate gender, often with wings. Their depiction may represent an association with love, heaven, peace or prosperity.
- Pendulum - The pendulum was discovered around 1602 by Galileo Galilei, and was adopted for time keeping by the Dutch mathematician and natural philosopher, Christiaan Huygens, who excelled in astronomy, physics, and horology.
The pendulum comprises a metal rod usually of brass or steel with a metal disk, known as a bob, at the end. The movement of the pendulum is driven by weights or a spring, and as a pendulum swings in a regular arc, it was found accuracy could be controlled to within a few seconds a week.
Timekeeping can be adjusted by changing the height of the bob on the rod, making the pendulum either swing slower or faster.
The disadvantage of the pendulum was that changes in temperature also changed the length of the pendulum, interfering with the accuracy of the clock, and so in the 18th century two types of mercurial pendulums were invented which countered the movement in the steel rod.
The pendulum was the world's most accurate timekeeping technology until the invention of the quartz clock, regulated by a quartz crystal, in 1927.
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