The A. Lange & Söhne Datograph Up/Down Ref. 405.035 stands as one of the most celebrated chronographs in modern haute horlogerie — a benchmark of movement architecture, finishing, and mechanical harmony.
Encased in platinum 950, the Datograph presents a black solid-silver dial with luminous rhodium-plated hands and contrasting white-printed scales, achieving perfect legibility and timeless aesthetic balance. Its signature large double date display (“Outsize Date”), flyback chronograph, and power-reserve indicator (Up/Down) form an impeccably functional layout that embodies Lange’s commitment to precision design.
Beneath the sapphire crystal back beats the in-house Caliber L951.6, hand-wound and finished to an unmatched standard — hand-engraved balance cock, gold chatons, blued screws, and bridges in untreated German silver. With a 60-hour power reserve and a column-wheel chronograph system, this caliber is widely regarded as one of the finest mechanical movements ever produced.
This 2016 example remains in excellent pre-owned condition, unpolished, and sharply defined, offered as a complete full set including original box, warranty papers, manuals, and loupe.
Specifications
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Brand: A. Lange & Söhne
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Model: Datograph Up/Down
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Reference: 405.035
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Year: 2016
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Condition: Excellent (Pre-Owned, Unpolished)
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Case Material: Platinum 950
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Case Diameter: 41 mm
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Thickness: 13.1 mm
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Dial: Black Solid Silver with White Print and Rhodium-Plated Hands
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Movement: Hand-Wound Caliber L951.6 (60 Hours Power Reserve)
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Functions: Flyback Chronograph, Large Date, Power-Reserve Indicator, Small Seconds
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Crystal: Sapphire (front and back)
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Strap: Black Alligator Leather
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Buckle: Platinum Lange Tang Buckle
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Water Resistance: 30 m
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Includes: Original Box, Papers, Manuals, Loupe (Full Set)
Why Collectors Want It
Few chronographs inspire such reverence as the Datograph Up/Down 405.035. Its architecture, depth, and hand-finishing define the pinnacle of contemporary watchmaking. Combining platinum gravitas, a perfectly balanced dial, and the legendary L951.6 movement, it remains a cornerstone of any world-class collection — an heirloom-grade piece that bridges technical artistry with timeless elegance.
