Sold for:
62,500 CHF

URBAN JURGENSEN DECK CHRONOMETER Urban Jürgensen, No. 56. Made circa 1812. Exceptionally fine and rare large silver free-sprung deck Chronometer with helical gold balance spring, and regulator dial in original three-tier fitted mahogany box. Four-body, "Consular", with hinged silver cuvette, polished, back with winding aperture.Box: three-tier, four sided spring mounted bowl, lock in front. White enamel, radial Roman hour chapter at 10 o'clock, symmetrically to the right minute chapter with fifteen-minute Arabic markers, subsidiary seconds. Blued steel "spade and poker" hands. 55.8 mm.(24'''), gilt brass half plate, slightly conical pillars, fusee and chain with Harrison's maintaining power, Arnold spring detent Chronometer escapement, two-arm cut compensation balance with sliding wedge temperature adjustment weights and mean-time/poising screws, gold helical balance spring with terminal curves, jeweled to the third wheel, diamond endstone on the balance staff, large motion train between hour and minute subsidiary dials. Notes Signed on the dial and the back plate. DIAM. 64 mm. A superbly made watch which exemplifies JÜRGENSEN'S talent. This is the EIGHTH of his famous series of chronometers. The escapement is based on ARNOLD's design. The brass escape wheel has cycloidal impulse faces. The detent is mounted to a gilded brass arm, which has micrometric adjustment, allowing for precision adjustment of the locking stone. Many were later converted to the Earnsha


Antiquorum

Auctioneer:
Antiquorum

Date:
2016-05-15

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