A gridiron Pendulum signed by E. Leybold’s
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A gridiron Pendulum signed E. Leybold’s Nachfolger from the 1900 circa. The gridiron pendulum was a temperature-compensated clock pendulum invented by British clockmaker John Harrison around 1726 and later modified by John Ellicott. It was used in precision clocks. In ordinary clock pendulums, the pendulum rod expands and contracts with changes in temperature. 36 cm high
