The Longitude at the Eve of the Third...

Geneva, Hotel Des Bergues, Oct 23, 1999

LOT 59

Ulysse Nardin, Locle, Suisse, Sidereal Time, Chronometer, No. 122398, circa 1945.Fine stainless steel keyless deck lever chronometer with power reserve indication and dead seconds' electrical contacts.

CHF 6,000 - 7,000

C. Four body, massive, "bassine et filets", polished, the screwed back with milled border. Stainless steel clipped cuvette. D. White enamel with Roman numerals, sunk subsidiary seconds and Up-and-Down scale. Blued steel "spade" hands. M. 22''', frosted and gilt, 23 jewels, straight line lever escapement, brass-invar Guillaume balance, eight adjustments, blued steel balance spring with terminal curve and special micrometric index.Signed on the dial, case and movement.Diam. 64 mm.


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Grading System
Grade: AA

Very good
Case: 3

Good
Movement: * 3
Dial: 3 - 01

Notes

Piece fitted with electrical contacts to provide a time signal for a separate electrical inking recorder.Such chronometers were made for the astronomers and therefore indicate the sidereal time used for atronomical observations. The sidereal day is the interval between two consecutive upper transits of the vernal poinin the plane of the meridian.