This understated and classy first-generation Datograph Perpetual is one example of German design at its best. The A. Lange & Shne ref.410.025 features a platinum case measuring 41mm in diameter and 13.5 mm in thickness. It has a solid silver dial with applied Roman numeral and index hour markers, a large double-date window, a month and leap year indicator at the 3:00 subdial, day of the week and AM/PM indicator at 9, and a moonphase indicator at 6. There is a user-friendly corrector pusher at 10 o’clock for advancing all calendar indications. Underneath the beautiful dial is the caliber L952.1 comprised of 556 parts, with 45 jewels and 36 hours of power reserve. The watch is supplied with a denim-colored leather strap.This pre-owned A. Lange & Shne Datograph Perpetual Calendar Chronograph Platinum Watch 410.025 comes with the manufacturer’s box.