Patek Philippe. A very fine and rare 18ct white perpetual calendar automatic wristwatch
Ref: 5038, No. 775297, Circa 1990's
27-jewel, Cal. 240Q, straight line lever escapement, Gyromax balance adjusted to heat, cold, isochronism and 5 position, shock protection, self compensating flat balance spring, 22ct gold micro-rotor, Seal of Geneva quality hall mark, black dial with printed Roman numeral hour markers, subsidiary dials for date, days, 24 hours, month and leap year, aperture for moon phase at 6, polished 18ct white gold case with fluted bezel, display screw down case back, fitted leather strap with 18ct white gold folding buckle, dial, case and movement signed 36mm.