Pocket chronometer

L5860

Pocket chronometer Long Caption: John Arnold successfully found the way to simplify Harrison's timekeeper design. This watch made in 1778 went so well on trial at Greenwich that Arnold decided to give it a new name. In the pamphlet he published in 1780 advertising his achievement, he called the timekeeper a 'chronometer' and was thus the person who invented the term in its modern sense. The watch is in fact a pocket chronometer housed in a 22-carat gold case. Credit line: © National Maritime Museum, Greenwich, London Object: ZBA1227 Artist: John Arnold Date: 1778 Size: 90 mm x 70 mm x 30 mm Click here to buy a bespoke print of this image.