Product images of John Arnold's pocket chronometer no. 1/36
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John Arnold's pocket chronometer no. 1/36
John Arnold (1736-99) successfully found the way to simplify Harrison's timekeeper design. This watch, No 1/36, 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.
- Image reference: D8566
- National Maritime Museum, Greenwich, London