This A. Lange and Sohne Zeitwerk reference 142.055 brings the Lumen treatment to one of the maison's most idiosyncratic modern watches. Limited to 200 pieces, it pairs the jumping digital display with a honeygold case, a combination produced in notably small numbers and one that gives the reference a distinct place within the Zeitwerk line. Its manual-wind caliber L043.9 drives the time display and power reserve, the architecture required for the constant-force jumping mechanism being much of what makes the watch so compelling to own. At 41.9mm across and 12.6mm thick, the case has substantial breadth without losing the proportion that keeps the watch balanced on the wrist. The Lumen dial adds the translucent, mechanically revealing character that sets this series apart within Lange's output. More than a variant, this reference shows how confidently Lange could recast the Zeitwerk's already radical format without softening any of its conceptual force.