The Breguet Classique Tourbillon Extra-Plat Squelette 5395 (Live Pics, Pricing)

The extra-thin tourbillon has been one of the more prominent battlefields on which the extra-flat/ultra-thin watch wars of the last few years have been waged. Since 2013, we’ve had some doozies, including the Arnold & Son UTTE, the Jaeger-LeCoultre Hybris Mechanica 11 (which was a minute repeater to boot), and of course, the remarkable Bulgari Octo Finissimo Tourbillon Automatic, which is the current world record holder for both thinnest automatic tourbillon, and thinnest tourbillon, period (having broken, finally, and by a razor thin margin, a record that had been held since 1986, by Audemars Piguet).

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