Patek Philippe has redesigned its famous Grand Complication with a minute repeater, a tourbillon, and a perpetual calendar with a retrograde date. It sports a new platinum case with a two-tier bezel and lugs as well as a black enamel dial with an aperture for the enamel lunar disk. The retrograde date is indicated by an unusual hand with a diamond-shaped tip.
Mechanical manually wound movement. Caliber R TO 27 PS QR. Minute repeater. Chime with two gongs activated by a slide piece in the case. Tourbillon. Perpetual calendar with retrograde date hand. Moon phases. Day, month, leap year in apertures. Seconds subdial. Black enamel dial, gold applied hour markers. 18K gold dial plate. Alligator strap with square scales, hand-stitched, shiny black, fold-over clasp. Case: platinum. Interchangeable full back and sapphire-crystal case back. Case is humidity and dust protected only (not water resistant). Case diameter: 40.2 mm. Height: 13.23 mm.