Product images of Marine chronometer, movement
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Marine chronometer, movement
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.
- Image reference: F1190
- National Maritime Museum, Greenwich, London, Ministry of Defence Art Collection