Aurore After having tackled the building of a marine watch in 1756, Pierre Le Roy, 50 years old, has reached a new step last year. It is said that the chronometer he presented to the Académie Royale des Sciences is as precise and reliable as famous Harrison's H4. ¤ Le Roy already invented the detent pivot escapement, or detached escapement, that he presented the Académie in 1748, the temperature-compensated balance by using bi-metallic components, and lately the isochronou

James Cook James Cook, the famous explorer, 44 years old by now, departs for his second voyage around the world with a copy of famous Watchmaker John Harrison’s H4, that is the watch K1, and three other time-keepers made last year. ¤ Harrison's H4 was the prototype which achieved to meet the accuracy requirement set by the Board of Longitude when crossing the Atlantic ocean. It completed it twice, in 1761 and 1763 - results met with some initial scepticism by the Board of L