4,720 CHF
“Deck Chronomètre” Ulysse Nardin, Locle & Geneve, No. 25426. Made circa 1939. Fine silver, keyless, circuit-break lever chronometer deck watch with power reserve indication and Guillaume balance. Four-body, massive, "bassine et filet", polished, silver bolt at 6 to activate the circuit-breaking, insulated and non-insulated silver pins for transmitting the signal. Silver hinged cuvette. Matte silvered with radial Roman numerals, outer minute track, subsidiary seconds and 36-hour up-and-down scale. Blued steel "spade" hands. Notes In a letter to the US Naval Observatory in 1910, Paul Nardin wrote that between 1883 and 1910 the company made only 50 circuitbreak survey chronometers for scientific institutions worldwide. The circuit-break (Survey) Chronometer was designed for surveying and mapping operations as well as solar observations and scientific experiments in remote areas, requiring accurate, audible time signals. The first circuit-break mechanism was installed in 1874 by the Negus brothers, chronometer makers from New York. Survey chronometers were superbly finished and adjusted, to meet the requirements of the surveying and scientific communities.
Auctioneer:
Antiquorum
Date:
2006-04-02
