SIHH 2015: A. Lange & Söhne Datograph Perpetual White Gold / Beyaz Altın Datograph Perpetual WG Ref. 410.038 Movement Lange manufacture calibre L952.1; 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 Movement parts 556 Bearing jewels 45 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 36 hours when fully wound Functions Time indicated in hours, minutes and subsidiary seconds with stop seconds; flyback chronograph with precisely jumping minute counter; tachymeter scale; perpetual calendar with date, day of week, month, moon phases and leap year; day/night indication Operating elements Crown for winding the watch and setting the time, two pushers for operating the chronograph, rapid-correction pusher for collectively advancing all calendar displays, one recessed corrector each for adjusting the day of the week, the month and the moon phases Case dimensions Diameter: 41.0 millimetres; height: 13.5 millimetres Movement dimensions Diameter: 32.0 millimetres; height: 8.0 millimetres Case White gold Dial Solid silver, grey; subsidiary dials rhodié Hands Hour and minute hands in rhodiumed gold, luminous; day, month and four-year hands in rhodiumed gold; chronograph sweep seconds hand, subsidiary seconds hand and minute counter hand in blued steel Crystal and back Sapphire crystal (Mohs hardness 9) Strap Hand-stitched alligator leather strap, black Buckle Lange prong buckle in white gold Read more: http://forum.saatforumu.com/viewtopic.php?f=162&t=18084&p=355196#p355196#ixzz3dXFK0m1E
