anniversary 160 limited edition limited edition of 500 pieces in red gold and 500 pieces in white gold ref 1600-100 ref 1602-100 caliber typ diameter of movement height of movement frequency number of jewels power-reserve oscillator 18 ct white gold 18 ct red gold un-160 mechanical self-winding movement 30.20 mm 4.80 mm 28 800 v/h 4hz 52 jewels approx 50 h in-house designed and manufactured balance wheel fitted with 4 18ct screws for frequency adjustments hour and minute hand in the center small second at 6 o clock and 2-digit big date display at 2 o clock display 1