Priced at: € 245,000
John Harrison (born 31. März 1693 in Foulby near Wakefield, Yorkshire; † 24. März1776 in London) was a self-educated English clockmaker. He invented the “marine chronometer”, a long-sought device in solving the problem of establishing the East-West position or longitude of a ship at sea, thus revolutionising and extending the possibility of safe long distance sea travel in the “Age of Sail”. The problem was considered so intractable that the British Parliament offered a prize of £ 20,000 (comparable to £2.87 million / €3.65 million / $4.72 million in modern currency) for the solution.