A. Lange & Söhne Langematik Perpetual

The A. Lange & Söhne Langematik Perpetual, reference 310.028 E, has a perpetual calendar within a 38.5 mm case in 18-carat white gold. This is a limited edition of 50 pieces. The blue 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 10.2 mm high, has a see-through back and is water resistant to 30 metres. A dark blue alligator leather strap fastens with an 18-carat white gold pin buckle. Self-winding calibre L922.1 contains 478 parts, runs for 46 hours, beats at 21,600 semi-oscillations per hour and carries a ZERO-RESET mechanism.