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.
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
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