Description
The Datograph Up/Down represents A. Lange & Söhne’s mastery of chronograph complications, first introduced in 1999. The 405.031 reference, launched as part of the brand’s contemporary collection, builds upon this legacy while incorporating modern refinements.
Case Architecture
The 41mm platinum case features:
- Three-part construction with polished and brushed finishes
- Sapphire crystal case back for movement visibility
- Thickness of 13.1mm, providing substantial wrist presence
- Ergonomically designed lugs for optimal comfort
- Rectangular chronograph pushers with precision actuation
Dial Details
The solid silver black dial showcases:
- Argenté-colored subsidiary dials at 4 and 8 o’clock positions
- Tachymeter scale along the outer perimeter
- Applied platinum hour markers with luminous material
- Lange signature outsized date window at 12 o’clock
- Power reserve indicator between 3 and 4 o’clock
- Rhodium-plated gold hands with luminous inlays
Movement Specifications
The Caliber L951.6 manual-winding movement features:
- 451 individual components
- 46 jewels
- Column-wheel control mechanism
- Precise jumping minutes counter
- Flyback function for instant chronograph reset and restart
- 28,800 vibrations per hour (4 Hz)
- 60-hour power reserve when fully wound
Movement Finishing
Exemplary finishing techniques include:
- Hand-engraved balance cock with floral pattern
- German silver three-quarter plate with Glashütte stripes
- Gold chatons secured by blued screws
- Hand-beveled edges on all components
- Straight-grained chronograph levers
- Black-polished steel parts
Chronograph Functions
Advanced chronograph capabilities include:
- Central chronograph seconds hand
- 30-minute counter at 4 o’clock
- Precisely jumping minutes counter
- Instantaneous minute counter jumps
- Zero-reset mechanism for precise synchronization
Strap and Buckle
The watch comes with:
- Hand-stitched black alligator leather strap
- Platinum prong buckle with brushed and polished finishing
- 18mm strap width at buckle
- 20mm strap width at lugs
Technical Innovations
Notable technical achievements include:
- Patented oversized date mechanism
- Precisely jumping minute counter system
- Zero-reset seconds hand mechanism
- Column-wheel control for precise chronograph operations
Maintenance and Service
Recommended service intervals:
- Full service every 5-7 years
- Water resistance check every 2-3 years
- Regular timing adjustment check recommended
Market Position
The Datograph Up/Down 405.031 maintains its position as one of the most sought-after chronographs in haute horlogerie, appreciated for its:
- Limited annual production numbers
- Strong value retention
- Collector appeal
- Recognition among watch connoisseurs
Awards and Recognition
The Datograph series has received numerous accolades from the watchmaking community, cementing its status as one of the finest chronographs ever created. Its influence on contemporary watchmaking continues to be significant, with many considering it the benchmark against which other high-end chronographs are measured.
The A. Lange & Söhne Datograph Up/Down 405.031 represents the pinnacle of chronograph manufacturing, combining traditional German watchmaking values with modern innovation. Its complex mechanism, superior finishing, and timeless design make it a true masterpiece of haute horlogerie.