A. Lange & Söhne Datograph Up/Down Lumen flyback chronograph represents the fourth chapter in the brand’s Lumen series. This special edition stands out through its semi-transparent sapphire crystal dial combined with luminous coatings, allowing the mechanical elements to be visible while maintaining excellent legibility in all lighting conditions. As with all Lumen creations, it blends technical transparency, architectural depth, and high-end watchmaking execution.
A. Lange & Söhne Datograph Up/Down Lumen flyback chronograph Design
The platinum case measures 41 mm in diameter and 13.4 mm in thickness, giving the watch a solid and refined presence on the wrist. The outer area of the dial is crafted from German silver and contains a precisely subdivided minute scale capable of recording intervals as fine as 0.2 seconds. Surrounding this is a tachymeter scale for speed measurement. The central section, made of grey-tinted sapphire crystal, reveals the large date mechanism and the finishing of the movement’s bridges, offering a striking view of the watch’s mechanical architecture.
Dial Layout and Luminous Display
The dial features the signature large date at 12 o’clock, a 30-minute counter at 3 o’clock, a small seconds display at 9 o’clock, and the Up/Down power-reserve indicator at 6 o’clock. All elements are treated with luminous coatings, giving the watch a vivid green glow in low-light environments. The large date display utilizes a transparent units disc rotating over a luminous background, while the tens disc is fully luminous, ensuring optimal readability both day and night.
Flyback Chronograph Function
The flyback chronograph allows the user to reset and restart the timing function instantly with a single push of the button at 4 o’clock. This design is especially useful for situations requiring consecutive timing sequences, reflecting the functional emphasis of the Datograph line and its reputation as one of the finest mechanical chronographs ever produced.
Movement: Calibre L951.7
Through the sapphire crystal caseback, the Calibre L951.7 hand-wound movement is fully visible. Composed of 454 parts, the calibre features a classic column-wheel design, an in-house balance spring, and a lever escapement. The hand-engraved escapement bridge bears Lange’s distinctive decorative style. Operating at 18,000 vph, it offers a 60-hour power reserve. The movement’s depth, layered structure, and polished steel components contribute to its status as one of the most admired chronograph movements in contemporary watchmaking.
The watch is completed with a black alligator leather strap and secured by a platinum buckle. Production is limited to 200 pieces, making it a highly collectible model within the Lumen series.
Specifications
A. Lange & Söhne Datograph Up/Down Lumen flyback chronograph
Platinum case, 41 mm diameter, 13.4 mm thickness, sapphire crystal caseback, semi-transparent dial, rhodium-plated hands, Calibre L951.7 hand-wound movement, 46 jewels, 18,000 vph, 60-hour power reserve, alligator leather strap, platinum buckle. Complication: Chronograph.
External Reference:
A. Lange & Söhne Official Website
