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160 ­ limited edition limited edition of 500 pieces in red gold and 500 pieces ... ref 1600-100 ref 1602-100 caliber typ diameter of movement height of movement ... frequency number of jewels power-reserve oscillator 18 ct ... mechanical self-winding movement 30.20 mm 4.80 mm 28 800 v/h 4hz 52 jewels approx ... balance wheel fitted with 4 18ct screws for frequency adjustments hour and ...