Lord Althorp Jump

Lord Althorp Jump, London, sold to Lord Althorp, with London hallmarks for 1888-89. Very rare and fine silver "humpback", moon phase, astronomical carriage clock with days of the week, date and phases and age of the moon, in original fitted traveling case with original silver ratchet key. Three-body, polished, the back with winding and setting shutter. Four bun feet, silver chain handle. Silver, engine-turned, radial Roman numerals, outer minute dot divisions on a polished chapter ring, moon-phase aperture at 6 o’clock, small subsidiary seconds below 12 o’clock, subsidiary days of the week and date on engine-turned dial plate below the hour and minute chapters. Gold Breguet hands. Humpback, 136 x 107, brass plates with turned pillars, reversed fusee with chain and maintaining power, horizontal gilt platform with lateral calibrated lever escapement, cut bimetallic compensation balance with Breguet balance spring with terminal curve.Signed on a small gold plaque fixed to the dial plate, outer case with Dessoutter’s label signed Lord Althorp.Dim. 160 x 115 x 75 mm. Notes Jump The firm was founded in 1854 by the brothers Richard Thomas and Joseph Jump who had both been apprenticed to and worked for B.L. Vulliamy. Richard Thomas was the inventor of the clockmaker's sector, a proportional gauge chiefly used for wheels and pinions. An ornament of Bond Street, through several generations, the firm made a wide variety of clocks, many of them in the style of Breguet. From at l