F1190

Marine chronometer, movement Long Caption: A marine chronometer numbered 462, by McLachlan. It has an eight-day double-frame fusee movement with three pillars, all fixed with blued screws. The movement is marked with the broad arrow. 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 blued helical balance spring. Credit line: © National Maritime Museum, Greenwich, London, Ministry of Defence Art Collection Object: LOA0139 Artist: McLachlan Date: 1850 Medium: metal; wood; glass Size: 216 mm x 205 mm x 200 mm Click here to buy a bespoke print of this image.