A. Lange & Söhne caliber L156.1

Lange manufacture calibre L156.1 DATOMATIC®, self-winding, crafted to the most exacting Lange quality standards, decorated and assembled by hand; precision-adjusted in five positions; unidirectional winding central rotor with 950 platinum centrifugal mass; balance bridge engraved by hand. Shock-resistant cam-poised balance with four poising screws, superior-quality balance spring manufactured in-house, frequency 28,800 semi-oscillations per hour (4 hertz), precision beat adjustment system with cam and whiplash spring. Time indicated in hours, minutes, and subsidiary seconds with stop seconds; date and day-of-week displays, chronograph with central chrono seconds hand and 60-minute counte