Le Roy Julien (1686 - 1759)one of most eminent French horologists contributing immensely to the progress of French and the world's watchmaking in the first half of the 18th century. In 1717 he presented to the Royal Academy of Sciences an equation clock showing true time and position of the sun. In 1739 Le Roy was appointed Clockmaker to the King and had his private quarters in the Louvre Galleries. He reintroduced and considerably improved adjustable potence for the escape wheel, introduced steel end-piece for balance piots to retain oil, and dumb repeating watches. In 1740 he invented the so called 'à bate levee', an arrangement improving the way the repeating work, or cadrature, is housed, and in 1755 he invented the anchor governor for striking and repeating mechanisms. These improvements and inventions were so useful that they were almost immediately adopted by other watchmakers. It can be safety stated that he introduced a new generation of watches. In 1715 he was introduced to the British clockmaker HenrySully; they worked together till the death of Sully in 1728, and participated in the reconstruction of the Société des Arts of which Le Roy became a director. Together with his son, an Academician, he contributed to the Grande Encyclopédie writing about clockmaking. His reputation was such that, along with Breguet, he was the most faked French watchmaker.