A. Lange & Söhne Lange 1 Perpetual Calendar

The A. Lange & Söhne Lange 1 Perpetual Calendar, reference 345.033 E, has jumping calendar displays in a 41.9 mm case in 18-carat pink gold. The perpetual calendar uses a peripheral month ring. The grey dial is crafted from solid silver and carries an outsize date, moon-phase display, day/night indicator and day-of-week display. The case measures 12.1 mm high, has a see-through back and carries a water-resistance rating of 30 metres. Self-winding calibre L021.3 contains 621 parts, runs for 50 hours and beats at 21,600 semi-oscillations per hour. A pin buckle in 18-carat pink gold secures the alligator leather strap.