Ulysse Nardin Executive Skeleton Tourbillon Titanium | Ref. 1713-139LE-HYPERSPACE-1

The flying tourbillon is among watchmaking's most demanding technical achievements, a complication whose purpose is to compensate for the effects of gravity on the balance wheel by rotating the entire escapement assembly once per minute. When that tourbillon is also skeletonised — its structure reduced to the minimum material consistent with mechanical reliability — and housed in a movement with a 170-hour power reserve, the resulting calibre occupies a tier of horological ambition shared by very few. The Ulysse Nardin Executive Skeleton Tourbillon in 45mm titanium is exactly this: a watch where every technical aspiration has been pursued without compromise.

Calibre UN-171 is a manual-winding movement of exceptional specification. The 170-hour power reserve — more than seven days of autonomous operation — reflects an energy architecture in which an oversized barrel and highly efficient wheel train work in concert with silicon components throughout the escapement to minimise friction losses. The silicon technology, drawn from Ulysse Nardin's InnoVision programme, provides lubrication-free operation that preserves the movement's performance across service intervals that conventional metal escapements cannot sustain. The ceramic bezel provides scratch resistance commensurate with the movement's longevity ambitions, while the sapphire crystal allows the skeletonised architecture to be observed from above with the same clarity as the display caseback provides from below.

Grade-5 titanium at 45mm creates the wrist presence appropriate to a movement of this mechanical stature — substantial enough to announce its presence, light enough to be worn throughout the day without fatigue. The leather strap with folding buckle provides a secure, refined attachment for a watch whose value justifies the most careful handling. Water resistance to 30 metres is appropriate for a grand complication piece. At CHF 39,025, the Executive Skeleton Tourbillon represents access to flying-tourbillon horology at a price point that, relative to the complication's engineering demands, constitutes genuine value. This is a watch for the collector who understands that a tourbillon is not decoration but discipline.