Looking for a super-thin tourbillon? Talk about being spoiled for choice. In recent years, we’ve seen remarkably slender movements from Arnold & Son (2.97 mm) and Bulgari (1.95 mm). But both of those are manual-wind. Breguet’s caliber 581, found in the Classique line, lays claim to the thinnest automatic tourbillon on the market. The Classique Extra-Plat 5367 brings a new grand feu off-white enamel dial, sans power indicator, offering maximum contrast with minimal clutter. The 18-karat rose gold case retains the customary open backing, all the better to study the mechanical triumph therein: an 80-hour power reserve, at 4Hz frequency, from a 3mm movement.
Breguet Classique Tourbillon Extra-Plat Automatique 5367, Price Upon Request; breguet.com