Franck Muller. A 18ct white gold jump hour manual wristwatch, Reference: 2852 Hs, silvered dial with Arabic numerals marking the minutes, the hour aperture at 12, with polished case with four screw held back, engraved 'Master of Complications No. 22', makers crocodile leather strap and 18ct white gold buckle, original box and papers. 30 mm.