Humpback Carriage Clock Jump

Humpback Carriage Clock Jump, London. Made circa 1890. Very fine and extremely rare, gilt-brass and shagreen, 8-day going “humpback” carriage clock with moon phases and age and triple date calendar. Two-body, polished bezels, the sides, base and back overlaid with green shagreen, the back with shuttered winding and setting holes, four gilt brass bun feet, latch for releasing the back door on the base. Silver, engine-turned, radial Roman numerals on a brushed chapter ring, outer dot minute divisions, moon-phase aperture above 12 o’clock flanked by signature cartouches, engine-turned dial mask, linear aperture for the days of the week, date and months below the dial. Gold Breguet hands. “Humpback”, 140 x 106, brass plates with four turned pillars, fusee with chain and Harrison’s maintaining power, horizontal gilt platform with lateral calibrated lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring with terminal curve, index regulator. Dial signed, interior of back door punched “M.F. Yorke” and scratch numbered “No. 944”. Dim. 155 x 114 x 66 mm. Notes The present clock is one of the celebrated series known to have been made by Jump, of which no two are quite the same. It is particularly unusual with a gilt brass and shagreen case, large moon phases at 12 and the linear digital calendar. Jump The first recorded clockmaking member of the Jump family was Richard Huyton Jump, who worked for Benjamin Louis Vulliamy. Richard's sons Joseph a