Three years after it was first presented, the DATOGRAPH UP/DOWN from A. Lange & Söhne is now available in a second version as well: in a pink-gold case with a black solid-silver dial.
Launched in 2012, the DATOGRAPH UP/DOWN is endowed with milestone technical features: A classic column-wheel control mechanism, a precisely jumping minute counter and a flyback function come together in a movement that showcases true engineering finesse.
The aesthetic quality of the calibre is reflected by the balanced dial layout with the characteristic Lange outsize date and the two argenté subsidiary dials for the seconds and the minute counter forming an equilateral triangle.
The UP/DOWN attribute is standard Lange terminology for the power-reserve indicator. UP stands for the maximum power reserve of 60 hours when fully wound, while DOWN means that the energy of the mainspring has been depleted and the pink-gold arrow enters the red zone of the indicator.
The black dial made of solid silver is embedded in an 18-carat pink-gold case with a diameter of 41.0 millimetres. Luminous hands and pink-gold baton hour markers accentuate the systematic design concept.
The sapphire-crystal caseback allows many components to be observed in action, for instance those of the precisely jumping minute counter, which assures precise time measurement, or the column wheel that controls the chronograph functions.
Composed of451 parts, the L951.6 manufacture calibre unites all typical Lange quality hallmarks, such as the sturdy three-quarter plate made of untreated German silver, lavishly finished movement parts, a hand-engraved balance cock and four gold chatons secured with screws.
These assets make this calibre one of the most seductive manifestations of A.Lange & Söhne’s competence in chronograph design.
Model: DATOGRAPH UP/DOWN (Ref. 405.031)
Lange manufacture calibre L951.6; manually wound, crafted to the most exacting Lange quality standards, decorated and assembled by hand; precision-adjusted in five positions; plates and bridges made of untreated German silver; balance cock engraved by hand
Diameter: 30.6 millimetres; height: 7.9 millimetres
Movement parts: 451
Screwed gold chatons: 4
Escapement: Lever escapement
Oscillator: Shock-resistant balance wheel with eccentric poising weights; balance spring manufactured in-house with a frequency of 18,000 semi-oscillations per hour, precision beat adjustment system with lateral setscrew and whiplash spring
Power reserve: 60 hours when fully wound
Time indicated in hours, minutes and subsidiary seconds with stop seconds; flyback chronograph with precisely jumping minute counter; power-reserve indicator; outsize date
Crown for winding the watch and setting the time, two pushers for operating the chronograph, one rapid correction pusher for the outsize date
Diameter: 41.0 millimetres; height: 13.1 millimetres
Solid silver, black; subsidiary dials argenté
Hands: Pink-gold hour and minute hands, luminous; chronograph hand in gold-plated steel; seconds and minute-counter hands in blued steel
Crystal and back: Sapphire crystal (Mohs hardness 9)
Hand-stitched alligator leather strap, red brown
Buckle: Lange prong buckle in pink gold