
Mechanical manual-wind movement featuring a dual time zone system for local and home time, plus a 24-hour home time sub-dial. It measures 21.9 mm by 3.35 mm, contains 178 parts, 18 jewels, and 6 bridges, with a Gyromax® balance, 28,800 vph (4 Hz) frequency, 44-hour minimum power reserve, and Patek Philippe Seal certification, protected by patent CH 340 191.