F1194

Marine chronometer, movement Long Caption: A marine chronometer numbered 7709, by A. Johannsen & Co. It has a two-day full-plate fusee movement with four pillars, all fixed with blued screws. The movement is marked with the broad arrow and the number 7709. The fusee, with stop-work and Harrison's maintaining power, has a pipe round the winding square. There is an Earnshaw-type spring detent escapement and a two-arm balance with a helical balance spring. Credit line: © National Maritime Museum, Greenwich, London, Ministry of Defence Art Collection Object: LOA0137 Artist: Johannsen Date: 1914 Medium: metal; wood; glass Size: 190 mm x 200 mm x 195 mm Click here to buy a bespoke print of this image.