ADOLPH LANGE. A FINE AND VERY RARE 18K GOLD OPENFACE KEYLESS LEVER POCKET WATCH WITH SPECIAL PATENTED SETTING MECHANISM

SIGNED ADOLPH LANGE, DRESDEN, NO. 7846, CIRCA 1870

细节

ADOLPH LANGE. A FINE AND VERY RARE 18K GOLD OPENFACE KEYLESS LEVER POCKET WATCH WITH SPECIAL PATENTED SETTING MECHANISM
Signed Adolph Lange, Dresden, No. 7846, circa 1870
With gilt-finished three-quarter plate first quality lever movement, diamond endstone, some jewels carried in screwed gold chatons, engraved balance bridge, bi-metallic compenation balance, unusual setting mechanism wherein the setting can only occur when the back lid is open and the crown is pushed in, gold cuvette, white enamel dial with Roman numerals, subsidiary seconds, engine-turned case with coin-edged band, dial and movement signed, case numbered and stamped with maker's mark MF
53mm diam.

拍品专文

Accompanied by a fitted leather-covered box, original A. Lange & Sons certificate and paper.

The present watch employs an unusual secure setting mechanism that, as indicated by the engraving on the case, was patented by Adolph Lange on May 5th of 1866. By opening the back lid of the watch a lever is released that engages the setting gears.

This mechanism echoes Jürgensen's bow setting which Jürgensen patented one year later on January 15th.