Harrison's first clock In 1713 John Harrison, with the help of his brother, James, successfully created his first clock. It shared many similarities with the early Ahasuerus Fromanteel clocks, including the separation of the backplate into two halves to allow work to be carried out on each train individually. With the exception of the brass escape wheel, the movement was made entirely of wood! The eight-day duration movement with anchor escapement features an oak dial with brass chapter ring, spandrels and date aperture. Harrison's signature, John Harrison, Barrow, fecit, appears on the chapter ring. Harrison also wrote his name and the date, 'Jon Harrison 1713', in ink on the calendar wheel. He was just 20 years old and living at Barrow upon Humber when he made this clock. The movement is on display at the Science Museum, London, as part of the Worshipful Company of Clockmakers Collection (Object Number L2015-3435 ). Image Credit Painting. John Harrison (1693-1776) / Thomas King, c1767. Object number:1884-217. Science Museum Group Collection © The Board of Trustees of the Science Museum, CC BY-NC-SA 4.0, https://collection.sciencemuseumgroup.org.uk/objects/co65456/john-harrison-oil-painting-oil-painting-portrait
