Baselworld 2013…7mm thin
If I am not mistaken, this is now the world’s thinnest tourbillon watch at 7mm. Just days ago Arnold & Son previewed their UTTE whose case is 8.34mm, and claimed world record status. The caliber in that watch was 2.97mm thin. However I have no word on the thickness of this caliber (although the case dimensions are certainly thinner). Back with more soon…
Breguet Classique Grandes Complications 5377BR
42mm rose gold case (7mm thin) with a finely fluted caseband, gold dial, silvered and engine-turned in four different patterns, hours chapter with Roman numerals; Breguet open-tipped hands in polished steel; small seconds on the tourbillon. Power reserve (90 hours) indicator at 8:30.
automatic mechanical extra-thin tourbillon movement, Breguet Cal 581DR, Barrel on roller bearings. Lateral lever escapement in silicon and anti-magnetic steel. Silicon balance spring. 4Hz frequency.
Also available in a platinum case: reference 5377PT/12/9WU.