Grasshopper Clock. Based on the first marine chronometer made by the clock maker John Harrison (1693-1776), this extraordinary instrument features the "grasshopper escapement" operated by two inter-linked pendulums that compensated for the motion of a ship. Case is solid mahogany. Eight-day fusee movement is solid brass, hand polished and goldplated. Inside the drawer are a winding key and a paperback copy of Dava Sobel's "Longitude". $12,500
A working replica of Harrison’s H3 timekeeper.
H1 - The first seaworthy clock, created by Harrison, who solved the longitude problem. Inspiring! National Maritime Museum in Greenwich
A brass congreve style rolling ball clock
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Andre-Charles Boulle (1642-1732). Podchasniki.
Wooden Gear Clock Plans from Hawaii by Clayton Boyer
Harrison's Marine Chronometer number 1 (H1) Constructed between 1730 and 1735, the H1 is essentially a portable version of Harrison's precision wooden clocks. It is spring-driven and only runs for one day (the wooden clocks run for eight days). The moving parts are controlled and counterbalanced by springs so that, unlike a pendulum clock, H1 is independent of the direction of gravity.