A. Lange & Söhne Lange 1 Perpetual Calendar

The A. Lange & Söhne Lange 1 Perpetual Calendar, reference 345.056 E, has a perpetual calendar and an 18-carat white gold case. The watch is a limited edition of 150 pieces. The case measures 41.9 mm across and 12.1 mm high, has a see-through back and is water resistant to 30 metres. The dial in 18-carat pink gold carries jumping calendar displays, a peripheral month ring, an outsize date, weekday and moon-phase displays and a day/night indicator. Self-winding calibre L021.3 contains 621 parts. The movement runs at 21,600 semi-oscillations per hour with a 50-hour power reserve. A white-gold pin buckle fastens the dark brown alligator leather strap.