The Origin of the Sundial

The Origin of the Water Clock

The Origin of the Combustion Clock

The Origin of the Hourglass

Japanese sundial in the Edo period

First-ever mechanical clock

Portable Clocks

The invention of the pendulum clock

The invention of the balance wheel and the cylinder escapement

Escapement for the Marine Chronometer

The lever escapement that led to modern developments

Temperature and regulators

Tourbillon

The pin-lever escapement that brought the watch to the masses

The Big Ben tower clock

The Shortt-Synchronome Free Pendulum Clock

The pursuit of even greater precision

The birth of the quartz timepiece

The pursuit of precision in quartz timepieces

Multifunctionality of quartz timepieces

Alternative power sources for quartz watches

Atomic clocks

The next generation is light

Spring Drive