Haagsche Klokje pendulum clock by Soloman Coster, Dutch, c. 1657

This is one of the first pendulum clocks ever made. The words ‘met privilege’ on the plaque show Coster was licensed by Christaan Huygens to use his pendulum idea, the biggest advance in the history of timekeeping. Only seven pendulum clocks made by Coster have survived.

Source: Purchased