The Longitude at the Eve of the Third...

Geneva, Hotel Des Bergues, Oct 23, 1999

LOT 44

French, circa 1880.Very fine and rare 60 hour going mahogany marine chronometer with power reserve indicator and Winnerl continuous auxiliary compensation balance.

CHF 18,000 - 22,000

C. Three body mahogany box with internal handles, the glazed upper section with hinged lid. Brass bowl and gimballed suspension. D. Silvered spotted finished, with Roman numerals, outer minute ring subsidiary seconds and Up-and-Down scale. Gilt brass "pear" hands. M. Brass spotted finished, full plate with conical pillars secured by screws, inverted fusee with chain and maintaining power, Earnshaw type spring detent escapement, Winnerl continuous auxiliary compensation balance diamond end-stone,free sprung blued steel helical balance spring.Dial diam. 80 mm.Dim. 16,5 x 15 x 15 cm.


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Grading System
Grade: AAA

Excellent
Case: 3

Good
Movement: * 3
Dial: 3 - 01

Notes

The Winnerl continuous auxiliary compensation balance, English Patent No. 1051, from March 10, 1876, is based on the same principle as the staple balance developed by Dent and Charles Frodsham at the same period and described in Revue Chronométrique.