The Lines of Longitude, determinants of one’s position in terms of navigation, was a crucial puzzle to be solved in the early era of English naval dominance. Thomas Earnshaw and his famed chronometers were rewarded and recognized by the Board of Longitude in 1805 for their work in helping to open up the seas to safe and accurate passage around the world. The Longitude timepiece from Earnshaw is a fitting tribute to the ingenuity, intelligence and grace in the design of the works. A large classically formed case opens to exhibit a complex yet precise and clear vision of timekeeping mastery.