A BRASS EPICYCLIC TIMEPIECE BY W. WIGSTON AND W STRUTT, DERBY, C.1820-30 the brass eight day chain driven single fusee movement on a 6 3/8inch skeletonised dial with black painted Arabic hours and 'dot' minutes, on a scrolling frame with chamfered edges and bifurcated brackets, the wheels with five crossings, on an oval base applied with a signature plaque, beneath a glass dome on a later marble base with bun feet, with pendulum 22cm high Catalogue Note The design of the movement makes use of the the epicyclic gearing used in some steam engines allowing for the simultaneous gearing up of the escape wheel and gearing down of the hour wheel. Because of the complexity of the design, it is believed that only 20 or so were originally made. For a near identical clock see Bonhams, 28th June 2011, Fine Clocks and Barometers, lot 107.