Patek Philippe Minute Repeater Advanced Research Fortissimo Ref. 5750P-001 The Patek Philippe "Advanced Research" Fortissimo Minute Repeater ref. 5750P-001, presented in December 2021 as a limited edition of 15 pieces, is the loudest minute repeater Patek Philippe has made: a patented amplifier with a flexibly suspended sound lever and an oscillating sapphire-crystal wafer carries the chime through four openings in a titanium ring. Its 18-carat gold dial is open-worked in a spoked motif inspired by the car wheels of the 1920s and 1930s. - Self-winding Calibre R 27 PS: 342 parts, 39 jewels, laser-textured platinum mini-rotor, Gyromax balance, 3 Hz, power reserve 43 to 48 hours - Minute repeater with platinum gongs and Fortissimo sound amplification - 40 mm platinum case, 11.1 mm high - Dial: black and silver, open-worked spoked motif, black-coated white gold kite-shaped markers, dauphine hands, open-worked small-seconds wheel - Orange alligator strap, folding clasp - Limited edition of 15 pieces Unworn, complete set. Photographed: the actual piece. Maker: Patek Philippe. Reference: 5750P-001. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.