"An Enlightening guidebook to the heritage of British watchmaking. Horology lovers of all levels are absolutely sure to discover worth here." six miles, or 55.seven km) at the end of a six months’ voyage. (The geographical mile is described as a single minute of arc along the Earth’s equator; compare https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/
The Basic Principles Of Understanding The complex world of chronometers
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