PATEK PHILIPPE REF. 5550 ADVANCED RESEARCH PLATINUM
Patek Philippe, Genève, No. 5627728, case No. 4761677, Ref. 5550P. Made in a special edition of 300 pieces, sold February 1st, 2013.
Very fine, rare and innovative, self-winding, water-resistant, sealed, platinum wristwatch with perpetual calendar, moon phases,
silicon escape wheel, Silinvar Spiromax balance spring and a platinum Patek Philippe deployant clasp. Accompanied by the original
winding box with Advanced Research port hole, Certificate of Origin, booklets, solid platinum case back, service box, hang tag and
push pin.
Two-body, solid, polished, transparent case back with cyclops lens over escape and balance wheels, rounded bezel, correctors in
the band, concave lugs, single diamond (0.02ct) set between the lower lugs, sapphire crystals.
Brushed silver with applied pink gold baton indexes and luminous dots, outer minute track, subsidiary dials for the days of the
month, of the week, the months, the 24 hours and leap year, aperture for the moon phases. Luminous pink gold feuille hands.
Cal. 240, stamped with the Patek Philippe Quality Seal, rhodium plated, fausses cotes decoration, 25 jewels, straight-line lever
escapement, Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock absorber, self-compensating free-sprung
Silinvar Spiromax balance spring, 21K gold rotor with zirconium ball bearings.