A. Lange and Söhne Datograph 410.025

The A. Lange & Söhne Datograph Perpetual reference 410.025 in platinum with silver dial is the manufacture's most complex serially produced wristwatch and one of the supreme achievements in modern horology. It combines the Datograph's legendary flyback chronograph with a full perpetual calendar, adding month, day, moonphase, and leap year displays to the already formidable chronograph, outsize date, and power reserve indication. The result is a 39mm platinum wristwatch that contains more mechanical intelligence per cubic millimeter than virtually anything else on earth. The caliber L952.1 is the hand-wound movement that orchestrates this extraordinary convergence of complications. With 36 hours of power reserve, it drives the flyback chronograph with column wheel and precisely jumping minute counter, the perpetual calendar with month, day of week, moonphase, and leap year indication, and the Lange outsize date -- all while maintaining the hand-finishing standards that A. Lange & Söhne applies without exception. The perpetual calendar requires no date correction until the year 2100, while the moonphase maintains accuracy to within one day every 122.6 years. Through the sapphire caseback, the movement reveals a world of mechanical wonder: the chronograph mechanism layered above the perpetual calendar module, every surface decorated by hand. Reference 410.025 in platinum represents the absolute summit of A. Lange & Söhne's production watchmaking. It is a watch that Walter Lange, who refounded the manufacture in 1990 with the dream of creating the finest watches in the world, could point to as the fulfillment of that ambition. The Datograph Perpetual does not merely display time; it comprehends it -- tracking seconds, minutes, hours, days, dates, months, moonphases, and the leap year cycle in a unified mechanical program of astonishing complexity. In platinum, with a silver dial, it is the king of Glashuette, and a strong contender for the title of the world's greatest wristwatch.