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Byzantine portable universal altitude sundial with geared calendrical device
Cast of a Saxon Sundial, original at Kirkdale Church, Yorkshire
1935-1958 (reproduction); 1055-1064 CE (original)
Moving magnet galvanometer with dial inscribed "Greenwich Mean Time", 1843-1897
Pendulum clock designed by Galileo in 1642 and made by his son in 1649, model.
1642-1649 (original); 1883 (model)
Three train, flatbed turret clock by E. Dent with double three-legged gravity escapement, c. 1939.