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Important Modern & Vintage Timepieces

Geneva, May 15, 2016

LOT 41

URBAN JURGENSEN SONNER JUMP SECOND CHRONOMETER TRAVEL CLOCK Urban Jurgensen Sonner, Riebenhaon, No. 1112. Made circa 1880. Fine, keyless, center-seconds, sterling silver deck Chronometer with Guillaume balance in original wooden box. Accompanied by the original winding and front key.

Two part mahogany box that can be lifted in an upright position. White enamel with Roman numerals, outer minute and seconds rings with fifteen-minute/seconds Arabic markers. Blued steel hands. 83 mm. frosted gilt, straight line lever escapement, bimetallic compensation balance, self compensating blued steel Breguet balance spring, index regulator with micrometric adjustment screw. Movement signed.

CHF 1,500 - 3,500

HKD 12,000 - 28,000 / USD 1,600 - 3,600


Grading System
Grade: AA

Very good

Case: 2-8

Very good

Slightly scratched

Movement: 2*

Very good

Overhaul recommended, at buyer's expense

Dial: 2-73-01

Very good

ENAMEL AND VARIOUS TYPES OF DECORATION Chipped under bezel,not visible when closed

HANDS Original


Notes

DIAM. 95 mm. This clock is illustrated in The Jurgensen Dynasty by John Knudsen, p. 182 and 183.