A. Lange and Sohne 140.029 Zeitwerk 18K White Gold (31982)

31982 A. Lange & Sohne 140.029 Zeitwerk 140029, 18k white gold with 18k white gold tang buckle, manual wind Lange caliber L043.1, 36-hour power reserve, black dial with innovative digital jumping hour and minute mechanism, power reserve at 12 o'clock, small seconds at 6 o'clock, sapphire crystal, display back, size: 41.9mm, thickness: 12.9mm. Like New with Box and Papers; dated August 2014.

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More about A. Lange and Sohne 140.029 Zeitwerk 18K White Gold

This is an 18K white gold A. Lange & Sohne Zeitwerk, 140.029. It has a leather strap with an 18K white gold tang buckle. The solid, 41.9 mm diameter three-body case, angled bezel, and downturned lugs are brushed and polished. It has a scratch-resistant sapphire crystal, and a sapphire display case back. There is a 36-hour up/down power reserve indicator at 12 o'clock; the dial is black with white gold hands, and it has a small seconds sub dial at 6 o'clock. A unique digital jumping hour/minute mechanism with two window apertures are at the 9 o'clock and 3 o'clock positions between the dial and the case. The 12.9 mm thick case, dial, and movement are all signed.

The manual winding A.Lange & Sohne Caliber L043.1 movement is rhodium-plated with fausses cotes embellishment. It's constructed with 78 jewels, 528 components, and a shock absorber mechanism. It has a straight-line lever escapement, and two screwed gold chatons. Included are a shock-resistant screw balance, and a monometallic balance spring that adjusts to 5 positions. The balance wheel has opposing weights, and the mechanism oscillates with a frequency of 18,000 vph. It has a precision beat-adjustment system with a lateral setscrew and a whiplash spring.

This watch debuted in 2011, and is the world’s first mechanical wristwatch with a jumping numerals display.