Pocket watch with cylinder escapement and tortoiseshell case made by Thomas Tompion, Fleet Street, London, between 1675 and 1700. Inscribed 'T. Tompion London 3' on the movement and inscribed 'Graham' ...

The escapement mechanism has been widely used for centuries in mechanical clocks. It is the mechanism by which a clock controls the release of stored energy, allowing it to advance in small ...