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Longines, A fine and very rare silver keyless lever two-day deck watch with helical balance spring and Guillaume balance
拍品 47

Longines, A fine and very rare silver keyless lever two-day deck watch with helical balance spring and Guillaume balance

Signed Longines, no. 1’927’932, circa 1909

已結束2017年5月15日

成交價

CHF 4,375

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Longines, A fine and very rare silver keyless lever two-day deck watch with helical balance spring and Guillaume balance
Signed Longines, no. 1’927’932, circa 1909
Movement: manual, cal. 24.99, 18 jewels, Guillaume balance, free-sprung blued steel helical balance spring with terminal curves
Dial: white enamel, Roman numerals, subsidiary seconds, up-and-down sector calibrated for 50 hours
Case: four-body, polished, gold hinge, silver cuvette
Signed: dial and movement signed, movement twice numbered, case numbered
Dimensions: 67.5 mm. diam.
With: Longines Extract from the Archives confirming that the present watch, a silver deck chronometer, caliber 24.99, was sent to Longines’ agent in Berlin on 24th June 1909

專家說明

This impressive and very well preserved high-precision deck watch is double numbered on the movement and therefore it is likely that it was destined for Observatory timing trial. Like those of other makers, the movements of Longines watches were double engraved with the movement serial numbers when the intention was to submit them for testing. Deck watches were navigational instruments and as such had to be extremely accurate with a known rate of variation. The present two-day going watch has a free-sprung balance spring meaning that the watch has no manual regulator and can therefore only be fine adjusted by a watchmaker. Only watches with superior timekeeping properties, already tested and regulated by a master watchmaker are made free-sprung.