Pre-owned in excellent condition Patek Philippe Perpetual Calendar, 36 mm white gold officer’s style case, self-winding automatic movement caliber 315 S QR, 30 jewels, beating at 28,800 vph, with approximately 48 hours of power reserve, matte white dial with painted roman numerals hour markers, minute markers around the outer trim, black hands,  retrograde date, month aperture at 3 o’clock, day of the week at 9 o’clock, moon phase at 6 o’clock and leap year window at 12 o’clock, sweep second hand, water resistant to 30 meters, hinged dust covered sapphire crystal back case,  scratch resistant sapphire crystal, black leather strap with white gold Patek Philippe folding buckle. This watch doesn’t have box or papers. It has an Extract of Archives dated from December 9^th 2003.