Black slate & marble mantle clock having Roman numerals &…
click the photo to enlarge
Black slate & marble mantle clock having Roman numerals & columned supports, with a key & pendulum. Condition good to fair, chip to the fron base, needs a service. Height 26.5 cm

You must be a subscriber, and be logged in to view price and dealer details.

Subscribe Now to view actual auction price for this item

When you subscribe, you have the option of setting the currency in which to display prices to $Au, $US, $NZ or Stg.

This item has been sold, and the description, image and price are for reference purposes only.
  • 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.

This item has been included into following indexes:

Visually similar items

An antique mantel clock, black slate & rouge marble with gilded highlights. 26 cm high, 35.5 cm wide

Sold by in for
You can display prices in $Au, $US, $NZ or Stg.

French black slate mantle clock having green marble colums, a 'Exposition Universelle' stamp to the mechanism, with two keys & a pendulum. Condition good, some early minor chips, needsn a service length 35 cm

Sold by in for
You can display prices in $Au, $US, $NZ or Stg.

A French slate and marble mantel clock, in architectural case, Roman numerals on enamel dial, 8-day striking movement (bell). (key and pendulum) height 34 cm

Sold by in for
You can display prices in $Au, $US, $NZ or Stg.

Ansonia black slate mantle clock of architectural form, having green marble inserts, Roman numerals & an enamel face dial, with a pendulum. Condition: good, working order, feet slightly off centre. Height 29.5 cm

Sold by in for
You can display prices in $Au, $US, $NZ or Stg.