Tourbillon Extra-Plat 5377
Extra-thin 3 mm self-winding movement, calibre 581DR, 16 lines, 42 jewels. Tourbillon in a titanium carriage. Inverted lateral lever escapement with silicon horns. Silicon balance spring. Frequency 4 Hz. Barrel mounted on roller bearings. Peripheral platinum rotor. 80-hour power reserve. Small seconds on the tourbillon axis. Ultra-thin 7mm case in 950 platinum or 18-carat rose gold. Silvered gold dial adorned with four different engine-turned patterns executed by hand : clou de Paris hobnail, barleycorn, straight chevrons and cross hatching. Sapphire caseback. Water-resistant to 3 bar ( 30m ). Diameter: 42mm.