URBAN JURGENSEN 'THE KING'S WATCH' QUARTER-REPEATING POCKET CHRONOMETER ROSE GOLD
Urban Jurgensen, Copenhagen, No. 859 made in 1855.
Highly important, exquisitely made and very rare 18K rose gold pocket Chronometer with a quarter-repeating, Earnshaw-
type spring detent Chronometer escapment.
Four-body, massive, "bassine et filets", engine-turned, gold hinged cuvette engraved with Danish Coat of Arms and
"Urban Jurgensens Sonner No 859'', with winding aperture, slide on the band at 1 o'clock for locking the repeating.
Silver, radial champlevé Roman numerals on a brushed chapter ring, outer minute divisions, outermost Arabic
10-minute numerals in square reserves within an engine-turned border, matte engine- turned center, offset large subsidiary
seconds ring at 6 o'clock, signed ''Urban Jurgensebs Sonner''. Blued steel Breguet hands.
51 mm., made from a Houriet garde-temps, frosted gilt, three-quarter plate, with cylindrical pillars secured by
screws, the back plate recessed for the barrel secured by a bridge, the fusee with chain and Harrison's maintaining power,
gold train,winding square surrounded by a dust pipe fixed on the top plate. Earnshaw-type spring detent escapement,
two-arm compensation balance with two wedged sliding weights, the rim with graduation for easy temperature adjustment,
two timing screws Offset solid balance clock. Helical balance spring.