Zeitwerk

The A. Lange & Söhne Zeitwerk reference 140.029 presents the brand's signature jumping digital display in a 41.9 mm 18k white gold case against a striking black dial. Hours and minutes advance in instantaneous jumps via large, legible numerals, a feat of mechanical engineering that demands a precisely regulated constant-force mechanism. The result is a dress watch that is simultaneously avant-garde in concept and deeply rooted in the Glashütte tradition of fine finishing.

The Zeitwerk was introduced in 2009 as one of the most technically ambitious pieces in A. Lange & Söhne's modern era, reviving the jumping-numeral display in a fully mechanical context at a time when such complications were rarely attempted at this level of refinement. The calibre L043.1 was developed entirely in-house and incorporates a remontoire — a constant-force device — that ensures the jumping discs advance with uniform energy throughout the power reserve. Reference 140.029, in white gold with a black dial, remained in production for approximately a decade, becoming a defining expression of the Zeitwerk line. It is regarded by collectors as a landmark in contemporary German watchmaking.