From pocket to wrist
The first pocket watch is generally attributed to a German clockmaker called Peter Henlein in 1524 (shown in the picture to the left) although these portable clocks would be almost unrecognisable by today's standards. Only display hour hands and using a clunky, fairly inaccurate mechanism, they were more of a status symbol than anything else, with disputed early advocates being Henry VIII and Charles II of England.
Decades passed and the first second hands and balance springs were added to the pocket watch in the late 17th century, with precision chronometers coming into use in the early 1700s. Progress was made in accuracy around this time, with Thomas Mudge inventing the lever escapement in 1759. It was not until nearly a century later however, that the first wristwatch made it onto the scene.